Return to question 1 Problem 7-21 (Algo) 18 points Benny the Barber owns a one-chair shop. At barber college, they told Benny that his customers would exhibit o Polsson arrival distribution and that he would provide an exponential service distribution. His market survey data indicate that customers arrive at a rate of 2.5 per hour. It will take Benny on average of 15 minutes to give a haircut. Based on these figures, find the following: a. The average number of customers waiting. (Round your intermediate calculations to 3 decimal places and final answer to 2 decimal places.) Answer is complete and correct. Average number of customers waiting 1.04 b. The average time a customer walts. (Round your answer to 2 decimal places.) Answer is complete but not entirely correct. Average walting time 9.00 minutes c. The average time a customer is in the shop. (Round your intermediate calculations to 3 decimal places and final answer to 1 decimal place.) Answer is complete but not entirely correct. Average time 0.7 minutos d. The average utilization of Benny's time. (Round your intermediate calculations to 3 decimal places and final answer to 1 decimal place.) Answer is complete but not entirely correct. Average utilization 303