1. A plant manufactures four parts P1,P2,P3 and P4, to be assembled into a product. Press machines are required for one operation on each of the parts. For planning purposes, it is assumed that plant personnel work at 88% (operator efficiency) of normal and machines have a utilization probability of 0.95 (machine efficiency). Policies establish that no run will be for less than the monthly production requirement. The plant works an 8-hour, 5-day week and set-up is carried out during the regular work shift. The required production is 10,000 per month (4.8 weeks /month). The following data are given (including set-up time per machine): It is desired to determine: (a) the number of press machines. (b) the number of press machine operators. (c) number of operators for set-up machine