1. It takes 2 min to load and unload a machine. Inspection, packaging, and travel between machines total of 1 min. The machining time is 6 min. The operator costs $15 /hr. and the machine costs $50/hr. a) What is the max number of machines that can be assigned to an operator without creating machine idle time during the repeating cycle? b) What assignment minimizes the cost per unit produced? c) If four machines are assigned to an operator, what will be the cost per unit produced? d) For what range of values for concurrent activity is the optimum assignment equal to three? e) If 11 machines are needed to meet the production requirement, how should they be assigned to the operator in order to minimize cost per unit produced