3. A production line has two stations A and B. Jobs arrive at the production line roughly at a rate of 10 cars per day. Jobs are first processed in station A and then sent to station B for tuning. When tuning is done, jobs are sent back to station A for the 2nd processing and then leave the production line. Thus all jobs visit stations in the order of A-B-A. On average, 20 jobs are in the station A area (either in service or waiting line) and 10 jobs are in the station B area (either in service or waiting line). (a) What is the long-run average length of time from when a job arrives until it leaves? (b) What is the long-run average length of time from when a job arrives at station A until it leaves station A (either for station B or exits the production line)? (c) What is the long-run average length of time from when a job arrives at station B until it leaves for station A? 3. A production line has two stations A and B. Jobs arrive at the production line roughly at a rate of 10 cars per day. Jobs are first processed in station A and then sent to station B for tuning. When tuning is done, jobs are sent back to station A for the 2nd processing and then leave the production line. Thus all jobs visit stations in the order of A-B-A. On average, 20 jobs are in the station A area (either in service or waiting line) and 10 jobs are in the station B area (either in service or waiting line). (a) What is the long-run average length of time from when a job arrives until it leaves? (b) What is the long-run average length of time from when a job arrives at station A until it leaves station A (either for station B or exits the production line)? (c) What is the long-run average length of time from when a job arrives at station B until it leaves for station A