C. A. 6th Cir. [Certiorari granted, 462 U. S. 1105.] Motion of petitioners for divided argument denied. Motion of respondents for divided argument and for additional time for oral argument denied. Motion of the Solicitor General for leave to participate in oral argument as amicus curiae and for divided argument granted, and 10 minutes of petitioners’ time for oral argument is allotted for that purpose.