Murray Manufacturing Corp. has the process displayed below. The drilling operation occurs separately from and simultaneously with the sawing and sanding operations. The product only needs to go through one of the three assembly operations (the assembly operations are parallel).

sawing	15 min/unit
sanding	15 min/unit
drilling	27 min/unit
welding	25 min/unit
assembly	78 min/unit

a) Which operation is the bottleneck? (2.5 marks) b) What is the throughput time for the overall system? (2.5 marks) c) If the firm operates 8 hours per day, 22 days per month, what is the monthly capacity of the manufacturing process? (5 marks) d) Suppose that a second drilling machine is added, and it takes the same time as the original drilling machine. What is the new bottleneck time of the system? (5 marks) e) Suppose that a second drilling machine is added, and it takes the same time as the original drilling machine. What is the new throughput time? (5 marks)