One field representative services five customers for a computer manufacturer. Customers request assistance at an average (Poisson-distributed) rate of once every four workdays. The field representative can handle an average (Poisson -distributed) of one call per day. Determine:
a. The expected number of customers waiting.
b. Tire average length of time customers must wait from the initial request for service until the service has been completed.
c, Tire percentage of time the service rep will be idle, i.e., the probability that a customer will not have to wait.
d. By how much would your answer to part a be reduced if a second field rep were added?