please solve the question from A to D accroding to the graph ASAP

10 15 12 13 30 25 15 20 18 a. What is the current capacity of each branch? What is the current capacity of the entire system? b. What is the bottleneck for each branch? What is the bottleneck of the entire system? c. If you could increase the capacity of only one operation through process improvement efforts, which operation would you select, how much additional capacity would you strive for, and what would the resulting capacity of the process be? d. If you could increase the capacity of another operation through process improvement efforts, which operation would you select, how much additional capacity would you strive for, and what would the resulting capacity of the process be