Renuka Jain's Car Wash takes a constant time of 4.5 minutes in its automated car wash cycle. Autos arrive following a
Poisson distribution at the rate of 9 per hour. Renuka wants to know:
a) The average wait time in the line = ______ minutes (round your response to two decimal places).
b) The average number of customers waiting on line = ______ cars (round your response to two decimal places)