please help :)

Consider the following process: 3 1 2 (Jill) 4 (Julie, machine 1) (Jake, machine 2) 3 (Julie) (Jen) The setup time and production time per unit of each task is as follows: Task Setup time in mins) 0 Time per unit (in mins) 3 1 2 40 8 3 0 18 4 0 5 So Julie performs tasks 1. She performs task 1 on every unit in a batch. Then, Jake runs a setup on a different machine before performing task 2 on every unit in the batch. After that, either Jill or Jen performs task 3 on the units. Finally, Julie does task 4. Tasks 3 and 4 are done by the workers only so they do not require any setups. (a) Compute process capacity in units/hour if the batch size is 35 units. (b) What batch size would you recommend for a process manager who wants to maximize flow rate but is also concerned about average flow time, when the demand rate is 6 units per hour? when the demand rate is 8 units per hour? (c) Using the current production batch size of 35 parts, how long would it take to produce a batch starting with an empty system (with no setup done)? Assume that all the units in the batch have to stay together (no smaller transfer batches allowed) when transferred to either Jill or Jen, who then processes the entire batch (the batch cannot be divided among the two workers). Also all the units have to stay together when transferred from either Jill or Jen to Julie