4-2 Develop a model of a simple serial two-process system. Items arrive at the with a mean time between arrivals of 10 minutes, with the first arrival at time Tvest immediately sent to Process 1, which has a single resource with a mean service time minutes. Upon completion, they are sent to Process 2, which is identical to (but indenen dent of) Process 1. Items depart the system upon completion of Process 2. Performance measures of interest are the average numbers in queue at each process and the total time in system of items. Using a replication length of 10,000 minutes, make the following four runs and compare the results (noting that the structure of the model is unchanged and it's only the input distributions that are changing): Run 1: exponential interarrival times and exponential service times Run 2: constant interarrival times and exponential service times Run 3: exponential interarrival times and constant service times Run 4: constant interarrival times and constant service times