1. A local Post Office in Bulawayo is open on Saturdays from 9:00am to 1:00pm. On the average, 100 customers per hour visit the Post Office during this period. Three postal clerks are on duty, and the mean time to serve each customer is 1.5 minutes. Previous studies have shown that the Poisson arrival distribution and an exponential service time distribution provide relatively good approximations of the Post Office's arrival and service operations. The local Post Office Master has received a number of complaints concerning the length of time required for customers to receive service on Saturdays. In addition, the three postal clerks have filed a grievance alleging excessive workloads during this period. The Postmaster is interested in determining the relevant service measures for the Post Office on Saturdays in order to respond to these issues. There have also been talk about the need for a new budget cut, and the Postmaster would like to know whether reducing the number of clerks on Saturday morning duty to two is feasible. What recommendations would you give to the Postmaster on the following issues? (a) Concerns of the customers, [6] (b) Work load grievances, (c) Budget cutting