find a) the average wait time in line: ___ minutes (round your response 2 decimal places)

find B) the average # of customers waiting in the line= ____ cars (round your response 2 decimal places)

Renuka Jain's Car Wash takes a constant time of 4.0 minutes in its automated car wash cycle. Autos arrive following a Poisson distribution at the rate of 9 per hour. Renuke wants to know, a) The average wait time in the line = ( minutes (round your response fo two decimal places)