3. (15) Consider the same closed flow line as before (the first station has a processing time of 2 minutes, the second one a processing time of 1 minute, and the third a processing time of 3 minutes). The flow system has constant WIP. The moving batch size is k = 2. a. (5) Compute CT and TH for w = 4. b. (5) Compute CT and TH for w = 6. c. (5) Compare CT and TH for the case of effective critical WIP in this line to CT and TH for the case of critical WIP for a line with k = 1. How much queue time is due solely to batching?