Repair requests are handled by a technician in a photocopy shop. Repair time, including travel time, is exponentially distributed, averaging 2 hours per call. Requests for copier repair arrive at an average rate of 3 per eight hour day (assumes Poisson). Determine:

1. Determine the average number of customers waiting for repair

2. 2. What is the average time in an 8 hour day that the technician is idle?