Consider again the serial flow factory of Problem $5\mathrm{.}5.$ Management expects

there to be a slow increase in demand $($i$.$e$.,$ arrival rates$)$ over the next few years.

$($a$)$ In order to help management plan for the future, find the system performance

measures $($CTsys and WIPsys$)$ for arrival rates of $0\mathrm{.}51/$hr$,0\mathrm{.}53/$hr$,$ and $0\mathrm{.}55/$hr$.$