(14.4) A total of 9000 stampings must be produced in the press department during the next three days. Manually operated presses (one operator per press) will be used to complete the job and the cycle time is 24 sec. Each press must be set up with a punch-and-die set before production starts. Setup time is 2.0 hr, and vailability is assumed to be 100%. How many presses and operators must be devoted to this production during the three days, if there are 7.5 hr of available time per machine per day