A newly opened car wash station has a car wash machine . the machine washes each car in a constant rate of 5 minutes per car. it has been estimated that costumers will arrive according to a poisson distribution at an average of 8 per hour. the owner would like to know:
1) expected average time in minutes a costumer waits in line
2) average number of cars in the station( both waiting in line and being washed).
please show work