C. A. 3d Cir. [Certiorari granted, 447 U. S. 904.] Motion of Congress of Advocates for the Retarded, Inc., et al. for leave to file a brief as amici curiae granted. Motion of respondents for divided argument granted. Motion of Illinois et al. for leave to participate in oral argument as amici curiae denied. Motion of petitioners for divided argument granted. Motion of American Psychiatric Association for leave to participate in oral argument as amicus curiae denied.