Marty's barber shop has one barber. customers have an arrival rate of 2.3 customers per hour, and haircuts are given with a service rate of 5 per hour. use the poisson arrivals and exponential service times model to answer the following questions: 1. what is the probability that one customer is receiving a haircut and one customer is waiting?
2. what is the probability that one customer is receiving a haircut and two customers are waiting?
3. what is the probability that more than two customers are waiting?