1. Modify Model 3-1: A Simple Processing System with all of the following changes:

• Add a second machine to which all parts go immediately after exiting the first machine for a separate kind of processing (for example, the first machine is drilling and the second machine is washing). Processing times at the second machine are independent of those from the first machine but drawn from the same probability as for the first machine. Gather all the statistics as before, plus the time in queue, queue length, and utilization at the second machine.
• Immediately after the second machine there s a pass/fail inspection that takes a constant 4.5 minutes to carry out and has an 75% chance of passing results; queueing is possible for the single inspector, and the queue is FIFO. All parts exit the system regardless of whether they pass the test. Count the number that fail and the number that pass, and gather statistics on the time in queue, queue length, and utilization at the inspection center. (Hint: Try the Decide flowchart module.)
• Include plots to track the queue length and number busy at all three stations; put all queue lengths together in the same plot, and put all numbers busy in the same plot (youll need to turn on the plot Legends to identify the three curves). Configure them as needed.
• Run the simulation for 480 minutes instead of 20 minutes. (Provide 4 decimal accuracy.)