Please state and explaine the steps and answers to this problem

One field representative services five customers for a computer manufacturer. Customers request assistance at an average (Poisson-distributed) rate of once every four working days. The field representative can handle an average (Poisson-distributed) of one call per day. Determine: Use Table 1.

a. The expected number of customers waiting. (Round your answer to 3 decimal places.) Expected number of customers waiting = ? b. The average length of time customers must wait from the initial request for service until the service has been completed. (Round your answer to 2 decimal places.) Average length of time = ? days c. The percentage of time the service rep will be idle. (Round your answer to 1 decimal place.) Percentage of Idle time = ? d. By how much would your answer to part a be reduced if a second field rep were added? (Round your answer to 3 decimal places.) Reduced number of customer(s) = ?

- ABLE 18.7 lite-queuing tables