A production process at Kenneth Day Manufacturing is shown in Figure . The drilling operation occurs separately from, and simultaneously with, sawing and sanding, which are independent and sequential operations. A product needs to go through only one of the three assembly operations (the operations are n parallel). a) Which operation is the bottleneck? b) What is the bottleneck time? c) What is the throughput time of the overall system? d) If the firm operates 8 hours per day, 20 days per month, what is the monthly capacity of the manufacturing process?