The production process shown below consists of five stages. The numbers in parentheses are the times in minutes to complete one unit before it moves on to the next stage. The demand rate is 48 units per hour. a. How many workers are needed at each stage if management wants a utilization of at least 80 percent? Round your answers up to the nearest whole number. Stage A : workers Stage B : workers Stage C: workers Stage D: workers Stage E: workers b. Suppose that the number of workers at each stage are as follows: What is the output rate at each stage? Round your answers to the nearest whole number. Stage A: units/hour Stage B: units/hour Stage C: units/hour Stage D: units/hour Stage E: units/hour c. Where is the bottleneck in this process? The bottleneck is