Staffing Problem - Heinrich's Deli Shift Time # of Workers Required Total Shift Cost Shift Time Cost per Hour Worker #1: 8AM-12PM 12 4 hours $10 $40 #2: 12PM-4PM 30 4 hours $15 $60 #3: 4PM-8PM 8 4 hours $12 $48 Decision Variables: X = # of workers on shift #1 (8AM-12PM) X2 = # of workers on shift #2 (12PM-4PM) X3 = = # of workers on shift #3 (4PM-8PM) What is the correct equation for the shift #1 constraint for required numbers of workers? X1 >= 50 X1 12 X1 >= 12 None of the above