• A one-chair hair shop has arrivals at the rate of one every 20±15 minutes. 50% of the arriving customers want a plain cut, 30% want a style, and 20% want a trim only. A plain cut takes 15±5 minutes, a style cut takes 25±10 minutes, and a trim takes 10±3 minutes.
• Using Excel to simulate 500 customers coming through the hair shop and determine:
2.1. Average customer inter-arrival time
2.2. Average service time
2.3. Average time in the queue
2.4. Maximum time in the queue
2.5. Average time in the system
2.6. Maximum time in the system
2.7. Average idle time of the server
2.8. Maximum idle time of the server