Sup. Ct. Cal. Motions of Sheet Metal Workers Trust Funds of Southern California et al, Laborers Health and Welfare Trust Fund for Northern California et al., U. A. Local No. 467 Pension Trust Fund et al., Laborers Health and Welfare Trust Fund for Southern California et al., and California Ironworkers Field Pension Trust et al. for leave to file briefs as amici curiae granted. Certiorari denied.