Q1. In the figure given below, operation 4 represents a rework operation on parts that fail inspection upon completion of operation 2. (Note: di represents the defect rate for operation :) 2 7500 units d=10 d=4% d=5% 4 d =50% How many units must the process start with in order to meet the required output of 7500 units in a week? b. Assume that operation 1 operate for 16 hours per day, five days per week. Assuming that 3 minutes standard time, 90% efficiency and 95% reliability, how many machines are needed for operation 1, given the information in part a? CAR