Milwaukee County (County) appeals from a judgment awarding damages to the minor children of the late Dorothy J. Boles (Boles) for its negligence in the care accorded her during the one hour and forty-two minutes she was at the Milwaukee County Medical Complex (Complex) emergency room. A jury found that the County was 100% at fault for Boles' instantaneous death after she left the Complex.
The salient facts are undisputed. Boles, born January 28, 1958, had a history of mental illness. In the afternoon of December 3,1983, she was stricken with an acute episode. Her older sister, Audrey Laster (Laster) had stopped at Boles' home to pick her up for a shopping trip. After Laster observed Boles drop a telephone, recite "Jesus saves, Jesus saves" and strike herself repeatedly on the chest, Laster called a Paratech ambulance which conveyed Boles to the Complex. Laster followed in her own car. At the Complex, Laster signed an authorization and consent for emergency services for her sister and for release of information to any hospital or doctor for continued care. Laster remained in a nearby waiting room. She had Boles' coat, purse and wig. Boles was admitted to the emergency room at 2:25 p.m. and recorded as discharged at 4:15 p.m. She left at approximately 4:07 p.m.
An entry into the hospital record by registered nurse Barbara Buettner recites that Boles told the hospital employees that they were not gods. Boles then attempted to stand upon an emergency room cart, but quieted down when security officers were called. Boles was placed in four-point soft restraints. When Boles slid down to the end of the cart, a chest restraint was applied. At 2:50 p.m., Boles told Nurse Buettner that she was "alright *807now" and wanted to return home. Nurse Buettner told Boles that it would be a good idea for her to stay and talk with a psychiatrist.
At 3:10 p.m., Dr. Theodore J. Galvani, Jr., a resident in emergency medicine, examined Boles. Dr. Galvani testified that in his opinion Boles was a danger to herself. Dr. Galvani's final diagnosis was "paranoid schizophrenic exacerbation." He ordered psychiatric consultation and telephoned the psychiatrist resident about the case. By the time the psychiatrist arrived, 4:15 p.m., Boles had left. Boles was last seen by Nurse Donna Manhardt (Manhardt) at 3:20 p.m. At that time, Nurse Manhardt noted that Boles was resting quietly in full soft restraints.
Two security officers were on duty when Boles left the hospital. Neither of them had an independent recollection of her departure. However, the entries in their notebooks indicate that Boles was either observed or escorted from the main information desk of the Complex to a public bus at 4:07 p.m.
At 5:40 p.m., Boles was pronounced dead on arrival at St. Mary's Hospital. She had been shouting at cars and hitting them with her hands near 1359 North Lincoln Memorial Drive, in Milwaukee. Boles was struck and killed by an automobile, when she ran into the roadway. She sustained multiple injuries, including broken legs and a fractured neck. The death certificate listed the cause of death as cervical vertebral fractures with hemothorax.
NEGLIGENCE
The County argues that Dr. Galvani and the Complex staff had no authority to detain Boles, and that Chapter 51, Stats., provides the only vehicle to forcibly *808detain a mentally ill individual.1 The County also notes that a voluntary commitment to a treatment facility is available only upon approval of the treatment director after certain criteria have been fulfilled.2 The County contends that neither of these alternatives were available to the Complex emergency room staff, and therefore Dr. Galvani, the nursing staff, and the security officers had no duty to prevent Boles' departure.
We disagree. The issue is not whether Boles was a fit subject for involuntary commitment or whether she met the criteria for voluntary commitment. The issue is whether the Complex, in the administration of its emergency room, violated a duty of care to Boles. See Payne v. Milwaukee Sanitarium Found., Inc., 81 Wis. 2d 264, 272, 260 N,W-2d 386, 390 (1977). Upon Boles' admission to the Complex, its duty to her was one of ordinary care under the circumstances. See id. "The general rule is that a hospital must in the care of its patients exercise such ordinary care and attention for their safety as their mental and physical condition, known or should have been known, may require." Cramer v. Theda Clark Memorial Hosp., 45 Wis. 2d 147, 149, 172 N.W.2d 427, 428 (1969).
In Pamperin v. Trinity Memorial Hospital, 144 Wis. 2d 188, 423 N.W.2d 848 (1988), the supreme court held that a hospital was liable for the negligence of an emergency room physician who was an independent contractor, since the hospital had apparent authority over the physician. There the supreme court held that the care to which the patient is entitled "consists of both direct care and support services." Id. at 193, 423 N.W.2d at 850. The question therefore is whether Dr. Galvani *809and his supporting staff exercised ordinary care to Boles under the circumstances presented. See Payne, 81 Wis. 2d at 272, 260 N.W.2d at 390 (1977).
The jury found the County negligent as to the care, safety and attention provided Boles. On appeal, the County does not directly assail this finding. It is undisputed that after his examination, Dr. Galvani requested a psychiatric evaluation for Boles and requested nurses' observation of her. He was satisfied that she should remain in restraints. We are convinced that credible evidence supports the jury's finding because the Complex failed to monitor or restrain Boles until she could be examined by the resident psychiatrist. It also failed to observe her,3 and to request Laster to remain with her. We confirm a verdict which is supported by credible evidence, particularly where it enjoys trial court approval. Fehring v. Republic Ins. Co., 118 Wis. 2d 299, 305, 347 N.W.2d 595, 598 (1984).
EVIDENCE
The County argues that the trial court erred in admitting expert opinion evidence tending to establish its negligence. The County asserts that the trial court abused its discretion in denying its motion to suppress the testimony of Marshall Segal, M.D. and a video deposition of Mark Olsky, M.D., both of whom qualified as experts in emergency medicine. Drs. Segal and Olsky both testified to the duty of the emergency physician and supporting staff to protect the emergency patient until the patient is placed in the care of those who can *810take necessary action. The County's position is that the alleged negligent failure to apply restraints properly did not require exposition by experts. See Cramer, 45 Wis. 2d at 150, 172 N.W.2d at 428 (1969) (expert testimony unnecessary for ministerial or routine care in a hospital).
However, in its postverdict motions for a new trial, the County failed to specify this alleged error. In Wells v. Dairyland Mut. Ins. Co., 274 Wis. 505, 518, 80 N.W.2d 380, 387 (1957), the supreme court stated:
We deem the correct rule to be that no error of the court should be reviewable as a matter of right on appeal without first moving in the trial court for a new trial bottomed on such error, if the error is of a category that a trial court could correct by granting a new trial. [Emphasis in original].
Admission of the experts' testimony was of a category which could be corrected by the trial court grant of a new trial. We decline to entertain the argument.
INSTRUCTIONS
The trial court charged the jury with respect to Boles' duty of care for her own safety. The court said:
In this case, evidence has been received that Dorothy Boles at the time of the accident that caused her death on December 3, 1983 was mentally ill. It is the law that a person who is mentally ill may be held to the same standard of care as one who has normal mentality. However, the plaintiffs have denied that Dorothy Boles failed to exercise ordinary care for her own safety on the ground that, without prior warning, Dorothy Boles was subjected to an illness that affected her ability to understand and appreciate her duty to exercise ordinary care for her own safety.
*811The law of Wisconsin is that where an individual through unexpected illness commits an act or omits a precaution which would otherwise constitute negligence, such act or omission is not negligence if the occurrence of such illness was not preceded by sufficient warning that a person of ordinary intelligence and prudence ought reasonably to foresee that his or her actions would subject a person to an unreasonable risk of injury.
However, when the occurrence of such illness should have been reasonably foreseen, then the person so disabled may be found negligent — may be be [sic] found negligent if such person should reasonably have foreseen that such illness would occur and effect [sic] her as to her own safety.
The trial court tailored Wis J I — Civil, secs. 1021 and 1021.2 to make it expositive of Boles' negligence and her duty of care to herself.4
*812The County insists that the charge relating to an unexpected illness has no basis in the record and effectively exonerated Boles from the consequences of her own negligence. The County argues that because the evidence conclusively shows that Boles suffered from mental illness for many years and that she was aware of her illness, the charge was inappropriate; the jury instruction dealt with a sudden and unexpected onset of which the County alleges that there is no supporting proof. The County argues that the jury should not have been given the opportunity to conjecture that Boles had no knowledge of her mental illness and that, if not restrained, she might injure herself.
Generally, a trial court possesses a wide discretion in formulating and presenting the jury instructions. Meurer v. ITT Gen. Controls, 90 Wis. 2d 438, 448-49, 280 N.W.2d 156, 162 (1979). The instruction should be warranted by the evidence and not submitted unless tailored to fit evidence in the record. See Foss v. Town of Kronenwetter, 87 Wis. 2d 91, 106, 273 N.W.2d 801, 809 (Ct. App. 1978).
The record contains evidence that Boles suffered periodically from mental illness for many years.5 It also *813established that Boles may have had a sudden and violent onset on December 3, 1983. Laster described the incident at Boles' home, and later that day Dr. Galvani described the illness as an "exacerbation." Whether the condition was without forewarning or whether it was a continuation of an ongoing illness presented a jury issue. The trial court properly instructed on both alternatives and commendably modified the standard charge to meet the particular issues presented.
DAMAGES — STATUTORY LIMIT
The County takes the position that the plaintiffs' recovery under sec. 893.80(3), Stats.,6 should be limited to $50,000 for the three children as a class, and not $50,000 for each child. The application of a statute to an undisputed set of facts is a question of law. Ball v. District No. 4, Area Bd., 117 Wis. 2d 529, 537, 345 N.W.2d 389, 394 (1984). If a statute is plain and unambiguous, we must apply its plain meaning. Tahtinen v. MSI Ins. Co., 122 Wis. 2d 158, 167, 361 N.W.2d 673, 678 (1985). A statute is ambiguous if reasonable, well-informed persons could disagree as to its meaning. Standard Theatres, Inc. v. State, 118 Wis. 2d 730, 740, 349 N.W.2d 661, 667 (1984). We are not free to consult extrinsic sources to ascertain the meaning of a statute, if it contains no ambiguity. Tahtinen, 122 Wis. 2d at 166, 361 N.W.2d at *814678. Neither party contends that sec. 893.80(3), Stats., is ambiguous and we ascertain no ambiguity.
To ascertain whether the word "person" found in subs. (3) refers to each child or whether it treats all of the children as a single class, we look to the language of the statute itself.7
The County argues that a wrongful death action, unknown to the common law, was created and defined by statute. Section 895.04(2), Stats., provides that if no spouse survives, the amount recovered shall vest in the deceased's lineal heirs as determined by sec. 852.01, Stats. Section 852.01 defines intestate succession. Therefore, the County concludes that the maximum recovery goes to the class limited by intestate succession.
We reject this argument because secs. 895.04(2) and 852.01, Stats., define who shall recover rather than the amount of recovery. Our conclusion is buttressed by the supreme court's holding in Wood v. Milin, 134 Wis. 2d 279, 397 N.W.2d 479 (1986). There, each of two joint tenants, who had suffered damages due to the negligent acts of a municipal building inspector, was permitted to recover the maximum under 893.80(3), Stats. Id. at 284-85, 397 N.W.2d at 481. The supreme court discussed sec. 700.17(2), Stats., which provides that each joint tenant has an equal interest in the entire property. The court further noted the various incidents of ownership enjoyed by each tenant. Id. The supreme court relied, in *815part, on Gleason v. City of Oklahoma City, 666 P.2d 786, 789 (Okl. Ct. App. 1983), which held, in a wrongful death suit brought by decedent's personal representative, that each claimant may recover the statutory maximum because each has suffered a separate loss.8 We conclude that each of Boles' children, having suffered separately the loss of their mother, is entitled to recover up to the sec. 893.80(3) maximum.
DAMAGES — PECUNIARY LOSS
Contending that the pecuniary loss awards have virtually no support in the record, the County insists either that this court should reduce them substantially or remand for a new trial.9 Generally, an appellate court *816sustains an award of damages if there is any credible evidence to sustain it. Gyldenvand v. Schroeder, 90 Wis. 2d 690, 697, 280 N.W.2d 235, 238-39 (1979). An unemancipated child may recover pecuniary damages for the wrongful death of its parent. Harris v. Kelley, 70 Wis. 2d 242, 254, 234 N.W.2d 628, 633 (1975).
Boles lived at Westlawn Housing Project with her three children. Laster frequently visited her sister. She observed Boles help the children write and read. Boles purchased a set of children's encyclopedia which she read to her children. Laster also observed Boles sweeping the floor and washing dishes. Occasionally, Boles helped clean Laster's home. Laster, a divorced parent with four children, described Boles as an average housekeeper.
Although Boles had not graduated from high school, she planned to obtain a General Equivalency Diploma (G.E.D.) and study computer science. On June 9, 1983, the Milwaukee Area Technical College conferred a certificate of recognition upon Boles for outstanding effort in completing forty classroom hours in the Adult Basic Evaluation Program. This program leads to a G.E.D.
Boles was not employed at the time of her death and she had never held a full time job. Since her death, the children have lived with Boles' mother, Ear lean McKinney.
The children called Dr. George R. Meadows (Meadows) to testify as to their pecuniary loss.10 Professor Meadows testified that household work, including cook*817ing, cleaning, child care and errands, has economic value even though no compensation is paid among family members. This is premised upon a need to pay for the services which would occur if the provider should become unavailable. One hypothesis assumed Boles would remain unemployed and would continue to provide services for the children during their minority. It factored-in components such as time-value discount, graduating price levels and inflation. Professor Meadows testified, without objection, that upon this hypothesis, Stacy's loss was $25,159, that Jeimale's was $36,603, and that Cresha's was $42,932.
The trial court charged the jury concerning the life expectancy of Boles and the children and instructed the jury on Wis J I — Civil, sec. 1880, pertaining to pecuniary loss. Credible evidence supports the elements of the pecuniary losses, their dollar value and the amount sustained by each child. The jury was correctly instructed. We find no reason to disturb the awards.
INTERVENING AND SUPERSEDING CAUSE
The County argues that Boles' conduct, running onto Memorial Drive and striking at cars in moving traffic, was an intervening and superseding cause which exonerated it of any negligence. This presents a legal issue which is to be heard and determined by the trial court after the verdict has determined that the first actor's, (here the defendant's), negligence was a substantial factor in causing the harm. Stewart v. Wulf, 85 Wis. 2d 461, 476, 271 N.W.2d 79, 86 (1978).
The County, however, never raised this issue in the trial court. Therefore, the trial court never had the opportunity to decide it. We deem it waived and decline *818to address it. See Paape v. Northern Assurance Co., 142 Wis. 2d 45, 53, 416 N.W.2d 665, 668 (Ct. App. 1987).
PUBLIC POLICY
The County, relying on Coffey v. City of Milwaukee, 74 Wis. 2d 526, 541, 247 N.W.2d 132, 140 (1976), posits six public policy reasons why its liability should be interdicted: (1) the injury is too remote from the negligence; (2) Boles' injury is out of proportion to the County's culpability; (3) in retrospect, it was highly extraordinary that Boles' death would ensue from the County's negligence; (4) Boles' recovery places an unreasonable burden upon the County; (5) recovery would open up the door to fraudulent claims; and (6) recovery would expose the County to a limitless amount of liability.
Aside from a prefatory reference to Coffey, the County has cited only one case authority in support of its contentions.11 The burden of research is left to the court. However, this court is not required to consider an argument unsupported by authorities. Sec. 809.19(l)(e), Stats. Accordingly, we address only the argument supported by authority: that Boles' recovery imposes too great a burden upon the County.
As noted in Coffey, a court determines a public policy argument, preferably, but not necessarily, after a full factual resolution. Coffey, 74 Wis. 2d at 542, 247 N.W.2d at 140. Without reference to statistical data, the County directs our attention to numerous emergency room patients who daily use urban hospital emergency rooms, to persons who may be stressful because of consumption *819of drugs including alcohol or who may suffer from mental illness or developmental disabilities, many of whom may leave the emergency room against medical advice. The County deplores imposition of a duty upon emergency room physicians to institute appropriate mental health proceedings on behalf of the mentally ill. The County predicts that extension of Schuster v. Altenberg, 144 Wis. 2d 223, 424 N.W.2d 159 (1988), to the emergency room would result in a wave of lawsuits which would trammel further the efforts of overworked staffs to diagnose and treat emergency patients.12
The framework of negligence was graphic. Dr. Galvani diagnosed Boles as mentally ill and found her to be a danger to herself. His opinion was based in part on her history and by her demonstration of violence to herself at home and within the hospital emergency room. Dr. Galvani called for a psychiatric consultation. We conclude that the failure to monitor or detain Boles until completion of her examination palpably was negligence. It prevented a final diagnosis which would have resulted either in a Chapter 51, Stats., proceeding13 or in discharge of Boles to Laster. From this negligence it was readily foreseeable that Boles, after being left on her own, would pursue a course of her own self-destruction.
The principal of public policy relied upon should not shield the County from liability. The rationale of this *820case does not extend to those not mentally ill who leave an emergency room against medical advice. It is inapplicable to the non-dangerous mentally ill. However, we perceive no reason why a public hospital on notice that it is treating a severely psychotic patient, who is a danger to herself, should be excused from a duty to exercise ordinary care to periodically monitor or retain her until a diagnosis is completed and a course of action is determined.
In summary, the court concludes that:
(1) credible evidence supports the jury finding of negligence in the care given Boles in the Complex emergency room;
(2) the County waived review of the trial court's admission of expert evidence on the issue of the County's duty of care and of the trial court's jury charge defining that duty;
(3) the trial court did not abuse its discretion when it tailored Wis J I — Civil, sec. 1021 and 1021.2 to fit the factual situation of this case;
(4) Sec. 893.80(3), Stats., provides a recovery of $50,000 maximum for each of the plaintiffs;
(5) credible evidence supports the jury award for pecuniary loss;
(6) the County waived review of Boles' conduct as an intervening and superseding cause of her death;
(7) the public policy argument that recovery would place an unreasonable burden on public hospital emergency rooms is rejected.
By the Court. — Judgment affirmed.
Section 51.20, Stats., provides for involuntary commitment for treatment.
See secs. 51.10(2), (4), and (4m), Stats.
The emergency room was located across the hall from the nursing station. However, no one checked on Boles between 3:20 p.m. and 4:15 p.m.
Section 1021 states:
NEGLIGENCE OF MENTALLY ILL
Evidence has been received (it appears without dispute) that the defendant at the time of (collision, accident, fire, or other alleged tort) was mentally ill. It is the law that a person who is mentally ill is held to the same standard of care as one who has normal mentality, and in your determination of the question of negligence, you will give no consideration to the defendant's mental condition.
Section 1021.2 states:
ILLNESS WITHOUT FOREWARNING
The defendant has denied that he was negligent in the operation of his automobile on the ground that, without prior warning, he was subjected to an illness that affected his ability (to understand and appreciate his duty to exercise ordinary care in driving his car) (to control his car in an ordinarily prudent manner).
The law of Wisconsin is that where a driver, through sudden illness or loss of consciousness, commits an act or omits a precaution which would otherwise constitute negligence, such act or omission is not negligence if the occurrence of such illness or loss of consciousness was not preceded by sufficient warning that a person of ordinary *812intelligence and prudence ought reasonably to foresee that he would, by driving a car, subject the person or property of another or of himself to an unreasonable risk of injury or damage.
However, when the occurrence of such illness or loss of consciousness should have been reasonably foreseen, then the person so disabled may be found negligent. The negligence is not in the manner of driving, but rather in driving at all, if such person should reasonably have foreseen that such illness or lack of consciousness might occur and affect his manner of driving.
Laster testified that in about 1975, or sometime afterwards, she overheard Boles talk to a psychiatrist on the telephone.
Section 893.80(3), Stats., provides in part:
The amount recoverable by any person for any damages, injuries or death in any action founded on tort against any . . . political corporation, governmental subdivision or agency thereof and against their officers, officials, agents or employes for acts done ... in the course of their agency or employment . . . shall not exceed $50,000 . . .. [Emphasis added.]
In Gonzalez v. City of Franklin, 137 Wis. 2d 109, 403 N.W.2d 747 (1987), the jury awarded an injured minor and his father each an amount in excess of the sec. 893.80(3) maximum. The supreme court affirmed a court of appeals reduction to $50,000 each for the father and son. The supreme court assumed each person was entitled to up to the $50,000 cap.
The Gleason court interpreted Okla. Stat. Ann. tit. 51, sec. 154 (1981), which stated that:
A. The liability of a political subdivision or an employee on claims within the scope of this act shall not exceed:
1. Twenty-five Thousand Dollars ($25,000.00) to any claimant for any number of claims for damage to or destruction of property, including consequential damages arising out of a single accident or occurrence;
2. Fifty Thousand Dollars ($50,000.00) to any claimant for all other claims arising out of a single accident or occurrence; or
3. Three Hundred Thousand Dollars ($300,000.00) for any number of claims arising out of a single occurrence or accident. [Emphasis added.]
The County argues that the Oklahoma statute is significantly different from sec. 893.80(3), Stats., because it uses the word "claimant" instead of "person." We disagree.
The jury awarded the children as follows: to Stacy Boles, born January 1, 1975, $33,492.33; Jeimale Allan, born October 3, 1979, $44,936.33 and to Cresha Riley, born September 9, 1981, $51,265.33.
Meadows is a faculty member at the University of Wisconsin-Milwaukee. He is an associate dean of social sciences in the College of Letters and Sciences and a professor, upon appointment, in the Department of Economics. Professor Meadows holds a Ph.D. in Economics from Washington University, in St. Louis and has done some consulting work for fifteen years.
Schuster v. Altenberg, 144 Wis. 2d 223, 424 N.W.2d 159 (1988).
In Schuster, the supreme court stated that "if it is ultimately proven that it would have been foreseeable to a psychiatrist, exercising due care, that ... by failing to take action to institute detention or commitment proceedings someone would be harmed, negligence will be established." Id. at 240, 424 N.W.2d at 166.
Chapter 51, Stats., provides, inter alia, for voluntary admission, emergency detention and involuntary commitment.