Activity 1 Activity 2 Activity 3 Activity 4 Activity 5 Welcome a quest Stress release Do the hair Ring up the bill Wash and condition the hair massage Mr. K's is a very popular hair salon. It offers high-quality hairstyling and physical relaxation services at a reasonable price, so it is always in high demand. The service process includes five activities that are conducted in the sequence described below (the time required for each activity is shown in parentheses): Activity 1: Welcome a guest and offer homemade herb tea (15 minutes); Activity 2: Wash and condition hair (17 minutes); Activity 3: Neck, shoulder, and back stress release massage (15 minutes); Activity 4: Design the hairstyle and do the hair (28 minutes); Activity 5: Ring up the guest's bill (8 minutes). Each activity has one employee dedicated to it. Assume the demand rate is very high (higher than the capacity of the process), but the employee at activity 1 only admits new customers at the rate of the bottleneck (unadmitted customers will just walk away). What is the utilization of the employee at activity 1