$8\mathrm{.}9.$ Consider a workstation with $11$ machines $($in parallel$),$ each requiring one hour of process

time per job with $2=5.$ Each machine costs $$10,000.$ Orders for jobs arrive at a rate of $10$

per hour with $2=1$ and must be filled. Management has specified a maximum allowable

average response time $($i$.$e$.,$ time a job spends at the station$)$ of $2$ hours. Currently it is just over

$3$ hours $($check it$).$