Repair calls are handled by one repairman at a photocopy shop. Repair time, including travel time, is exponentially distributed, with a mean of 2.5 hours per call. Requests for copier repairs come in...

Repair calls are handled by one repairman at a photocopy shop. Repair time, including travel time, is exponentially distributed, with a mean of 2.5 hours per call. Requests for copier repairs come in at a mean rate of 2.0 per eight-hour day (assume Poisson). Determine the following:





a.The average number of customers awaiting repairs.(Round your answer to 2 decimal places.)

b.System utilization.(Round your answer to 2 decimal places.)

c.The amount of time during an eight-hour day that the repairman is not out on a call.(Round your answer to 2 decimal places.)

d.The probability of two or more customers in the system.(Do not round intermediate calculations. Round your answer to 4 decimal places.)