I've gotten this question wrong so many times, please explain this! A priority waiting system assigns arriving customers to one of four classes. Arrival rates $($Poisson$)$ of the classes are shown in the

following table: Use Table $18\mathrm{.}4.$

Five servers process the customers, and each can handle $6$ customers per hour.

a$.$ What is the system utilization? $($Round your answer to $2$ decimal places.$)$

$$

b$.$ What is the average wait for service by customers in the various classes? How many are waiting in each class, on average? $($Round

your answers to $3$ decimal places.$)$

c$.$ If the arrival rate of the second priority class could be reduced to $3$ units per hour by shifting some arrivals into the third priority

class, how would your answers to part $b$ change? $($Round your answers to $3$ decimal places.$)$