A bank has three tellers who can each serve 13 customers per hour on average with service times ollowing an exponential distribution.A customer arrives at the bank every three minutesion averag according to an exponential distribution.
A. Find the percentage of time that each teller is busy.
B. Find the probability that there are more than two customers in the bank.
C. Find the average number of customers in the bank.
D. Find the average time a customer spends waiting to be helped.
E. Find the probability that the bank is empty. F. Find the average number of customers in line to be helped.
G. Find the average time a customer will spend in the bank.