A two-server queueing system is in a steady-state condition and the steadystate probabilities are P0 =1/16 , P1 =1/4, P2 =3/8, P3 =1/4, P4 =1/16 , and Pn = 0
if n > 4. The mean arrival rates are λ0 = 8, λ1 = 4, λ2 = 2, λ3 = 1, and
λn = 0 if n > 3. Find
(i) the expected number of customers in the queue,
(ii) the expected number of customers being served,
(iii) the expected waiting time in the queue per customer, and
(iv) the expected service time per customer.