C. A. 9th Cir. [Certiorari granted, ante, p. 1032.] Motion of Salt River Project Agricultural Improvement and Power District et al. for leave to file a brief as amici curiae granted. Motion of the Solicitor General for leave to participate in oral argument as amicus curiae and for divided argument granted. Motion of Montana for leave to participate in oral argument as amicus curiae and for divided argument granted.