A Car Wash Takes a Constant Time of 9

Essay

A Car Wash takes a constant time of 9.1 minutes in its automated car wash cycle. Autos arrive following a Poisson distribution at the rate of 6 per hour. The owner wants to know:
a) The average waiting time in line.
b) The average length of the line.
c) The average utilization rate.
d) The average time in the system.
e) The average number of customers in the system.