Problem 15-9 (Algorithmic) Marty's Barber Shop has one barber Customers have an arrival rate of 2.1 customers per hour, and haircuts are given with a service rate of4 per hour. Use the Poisson arrivals and exponential service times model to answer the following questions: a. What is the probability that no units are in the system? If required, round your answer to four decimal places. b. What is the probability that one customer is receiving a haircut and no one is w c. What is the probability that one customer is receiving a haircut and one customer is waiting? If required, round your answer to four decimal places. d. What is the probability that one customer is receiving a haircut and two customers are waiting? If required, round your answer to four decimal places. no? It required, round your answer to four decimal places. 93: D e. What is the probability that more than two customers are waiting? It required, round your answer to four decimal places. P(More than 2 waiting] = \\:| f. What is the average time a customer waits for service? If required, round your answer to four decimal places. Wa : \\:| hours