
    No. 80-757.
    No. 80-895.
    No. 80-936.
    New York Mercantile Exchange et al. v. Leist et al.; Clayton Brokerage Co. of St. Louis, Inc. v. Leist et al.; and Heinold Commodities, Inc., et al. v. Leist et al.
   C. A. 2d Cir. [Certiorari granted, 450 U. S. 910.] Motion of petitioners in No. 80-757 to divide oral argument with petitioners in Nos. 80-895 and 80-936, and motion of petitioners in Nos. 80-895 and 80-936 to divide oral argument with petitioners in No. 80-757, granted. Motions of petitioners in Nos. 80-895 and 80-936 for designation of counsel to present oral argument denied.  