One field representative services five customers for a computer manufacturer. Customers request assistance at an average (Poisson- distributed) rate of once every six workdays. The field representative can handle an average (Poisson-distributed) of four call per day. Refer to the Table18-6 for Dand values. a. The expected number of customers waiting. (Round the final answer to 3 decimal places.) Waiting customers 0.7 b. The average length of time customers must wait from the initial request for service until the service has been completed. (Round the final answer to 2 decimal places.) Average time days c. The percentage of time the service rep will be idle, i.e., the probability that a customer will not have to wait. (Round the final answer to 1 decimal place.) Idle percentage % d. By how much would your answer to part a be reduced if a second field rep were added? (Round the final answer to 3 decimal places.) fewer customers will be waiting on average