$7.15 A production process at Kenneth Day Manufacturing is shown in Figure S7.9. The drilling operation occurs separately from, and simultaneously with, the sawing and sanding operations. Assembly Sawing Sanding 0.7 unitshr 6 unitshr 6 unitshr Welding Assembly 2 units.hr 07 unitsher Drilling Ascorby 4 units 0.7 untuh FIGURE $7.9 A product needs to go through only one of the three assembly oper- ations (the operations are in parallel). a) Which operation is the bottleneck? b) What is the process time of the overall system? c) What is the process cycle time of the overall system? d) If the firrn operates 8 hours per day, 20 days per month, what is the monthly capacity of the manufacturing process