In an $\frac{M}{M^{{?}^{?}}}$ queueing system, the arrival rate is $7$ customers per hour and the service rate is $12$ customers per hour. If the service process is automated $($resulting in no variation in service times but the same service rate$),$ what will be the resulting performance measurements?

Note: Round your answers to $3$ decimal places.

a$.$ What is the utilization?

Utilization

b$.$ What is the expected number of customers in the system $(L)?$

Number of customers