Help solve using Arena Program:

Develop a model of a simple serial two$-$process system. Items arrive at the system with a mean time

between arrivals of $10$ minutes, with the first arrival at time $0.$ They are immediately sent to Process

$1,$ which has a single resource with a mean service time of $9$ minutes. Upon completion, they are sent

to Process $2,$ which is identical to $($but independent of$)$ Process $1.$ Items depart the system upon the

completion of Process $2.$ Performance measures of interest are the average number in queue at each

process and the total time in system of items.

a$)$ Using a replication length of $10,000$ minutes, make $10$ replications of the following four

runs:

Run $1$: exponential interarrival times, exponential service times

Run $2$: constant interarrival times, exponential service times

Run $3$: exponential interarrival times, constant service times

Run $4$: constant interarrival times, constant service times

b$)$ Compare the results. Which run has the greatest variability between replications? Which has

the least? Explain why. Note that the structure of the model is unchanged, only the input

distributions are changing. $[$Hint: For constant interarrival$/$service times, input the constant

time in the expression. For example, if we have constant service times of $7$ minutes, input

$"7"$ as the expression. As always, don't forget to check units.$]$