Q. Customers arrive at Paul Harrold's Styling Shop at a rate of 3 per hour, distributed in a Poisson fashion. Paul can perform haircuts at a rate of 5 per hour, distributed exp1ntially.
a) Find out average number of customers waiting for haircuts.
b) Find out average number of customers in shop.
c) Find out average time a customer waits until it is his or her turn.
d) Find out average time a customer spends in shop.
e) Find out percentage of time that Paul is busy.