b$)$ Sutera Manufacturing has the process as shown in Figure $2.$ 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"$).$

i$)$ Define the bottleneck station and bottleneck time of the system

ii$)$ Determine the throughput time for the overall system

iii$)$ If the firm operates $8$ hours per day, $22$ days per month, determine the monthly capacity of the manufacturing process

iv$)$ Second drilling machine is proposed to be added, and it takes the same time as the original drilling machine. Define the new bottleneck time of the system

Figure $2$: Product structure