Assume an M$/$M$/1$ queuing model. The mean arrival rate is $6$ per hour and the average

processing time is $8$ minutes.

$1.$ The server$$s utilization is $75\%$

a$)$ True

b$)$ False

$2.$ What is the average waiting time in the system?

a$)30$ minutes

b$)32$ minutes

c$)40$ minutes

d$)44$ minutes

e$)$ None of the above

$3.$ What is the average number of customers in the line?

a$)2\mathrm{.}25$

b$)3\mathrm{.}00$

c$)3\mathrm{.}20$

d$)4\mathrm{.}00$

e$)$ None of the above