Benny the Barber owns a one-chair shop. At barber college, they told Benny that his customers would exhibit a Poisson arrival distribution and that he woufd provide an exponential service distribution. His market survey data indicate that customers artive at a rate of 2.5 per hour. It will take Benny an average of 20 minutes to give a haircut. Based on these figures, find the following: o. The average number of customers waiting Note: Round your intermediate calculations to 3 decimal places and final answer to 2 decimal places. b. The average time a customer waits Note: Round your answer to 2 decimal places. c. The average time a customer is in the shop Note: Round your intermediate calculations to 3 decimal places and final answer to 1 decimal place. d. The average utilization of Benny's time. Note: Round your intermediate calculations to 3 decimal places and final answer to 1 decimal place