J-M 1 a After three days of spring football practice at Michigan, everybody wants to know "Who's the quarterback?" t Michigan lost Steve Smith to graduation and backup David Hall to a knee injury, leaving a little-used junior (Jim Harbaugh) and two sophomores (Russ Rin; ahd Chris Zurbrugg). ?'Werve got three of 'em out there working and we'll be all right," U-M coach Bo Schembechler saidFriday. "They are all good athletes and run well. We'll keep the option in with each, but we won't use it as extensively as with Steve." Schembechler is banking on the defense to carry his cluSearly. "We've got at least seven or eight petitions that are solid." ; He is impressed with Paul Jokisch, a 6-foot-8, 230-pound basketball forward and split end. Jokisch moves .to the the football team this season after playing' two Wolverine basketball seasons. ; "What I've seen in three days, without a scrim-magejs that he is a football player and is deceptively fast," Schembechler said. "I'd love to have had him the last two years to see where he'd be today. If he chooses to make a commitment to football, he can be a good player. You send him down underneath and at 6-8,nie" makes a hell of a target." r . i Tommy George