1. In this problem, assume Poisson arrivals and exponential service times. Customers of Plaka Record rental outlet arrive at the store to rent CDs with an arrival rate of 1.25 customers per minute. The store has only 1 counter with a service rate of 2 customers per minute.

NOTE: Suppose that Plaka Record rental outlet adds another counter to serve the customers simultaneously.

REQUIRED:

a. The average number of customers in the waiting line

(In fraction form, example: 2/5)

b. The average number of customers in the system

(In fraction form, example: 2/5)

c. The average time a customer spends in the waiting line

(In fraction form, example: 2/5)

d. The average time a customer spends in the system

(In fraction form, example: 2/5)