In a single$-$server M$/$M$/1$ queuing system, the arrival rate $($A$)$ is $5$ customers per hour, and the average time a customer spends in the system $($W$)$ is $0\mathrm{.}2$ hours. Calculate the service rate $().$ Then, determine the utilization $($p$).$ What is the value of p$?21$Page $3$:$3$A$)0\mathrm{.}2$Page $4$:$4$B$)0\mathrm{.}5$ hoursC$)0\mathrm{.}6$D$)0\mathrm{.}8$