QUESTION 7 1 points Save Answer During registration at State University every semester, students in the college of business must have their courses approved by the college adviser. It takes the adviser an average of 4 minutes to approve each schedule, and students arrive at the adviser's office at the rate of 12 per hour. The dean of the college has received a number of complaints from students about the length of time they must wait to have their schedules approved. The dean feels that waiting 8 minutes to get a schedule approved is not unreasonable. If the average time each student spends waiting and being served (W') is changed to 8 minutes, the new service rate (@', average number of students served per hour) is O 15 O 17.5 19.5 O 22 none of the above QUESTION 8 1 points Save Answer The Riverton Post Office has three stations for service. Customers line up In single file for service on a FIFO basis. The mean arrival rate is 90 per hour, Poisson distributed, and the mean service time per server is 1.50 minutes, exponentially distributed. Compute the operating characteristics for this operation. the postal workers are idle of the time and the percentage of the time a customer can walk in and get served without waiting at all is O 25%; 4% O 25%; 7.5% 0 75%; 4% 75%; 7.5% none of the above