(4) A production process at Kenneth Day Manufacturing is shown in the figure below. 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 in parallel). Assembly Sawing Sanding 0.7 units/hr 6 units/hr 6 units/hr Welding Assembly 2 units/hr 0.7 units/hr Drilling Assembly 2.4 units/hr 0.7 units/hr Which operation is the bottleneck? What is the operation time at the bottleneck operation? What is the throughput time (i.e., time for a unit to go through the system) of the overall system? . .