C. A. 5th Cir. [Certiorari granted, 456 U. S. 971.] Motions of Business Roundtable et al. and City Investing Co. et al. for leave to file briefs as amici curiae granted. Motion of the Solicitor General for leave to participate in oral argument as amicus curiae, for divided argument, and for additional time for oral argument granted, and 10 additional minutes allotted for that purpose. Justice White took no part in the consideration or decision of these motions.