Consider a bank with one teller. The average time between customer arrivals to the bank is 10 minutes. The teller can serve customers in 7.5 minutes on average. Assume the coefficient of variation of the inter-arrival times and service times is 1.

What is the average time a customer spends in the system? (i.e., W)

A: 0.1875 hrs

B: 0.3125 hrs

c: 0.375 HRS

D: 0.5 hrs

E: 0.625 hrs

What is the avergea number of customers waiting in the system (Lq)

A - 2.25

B - 2.5

C - 2.75

D - 3

E - 3.25