Please solve this problem following the example in the slides. It is the exact problem that is in the appendix of the Chapter 12 Slides:

Kathys Sewing Shop can serve about five customers per hour. For the past two weeks Kathy has kept track of the customer arrival rate, and the average has been four customers per hour. Kathy is interested in calculating the following 5 operating characteristics for her store:

• The average server utilization
• The expected # of customers in the system
• The expected # of customers in queue
• The expected waiting time in the system
• The expected waiting time in queue