For questions 5 through 9, each question is for the "single-server with infinite calling population" model. Also, each question is for a different business example of this model. 5. A single person fast food truck business can service one order in an average of 5 minutes. Orders arrive at the average rate of 9 per hour. What is the average length of the queue (the average number of orders "waiting in line")? A. About 0.7 B. 2.25 C. 3 D. None of the above 6. A medical receptionist experiences an average arrival rate of 20 clients per hour. The receptionist is busy 80% of the time. The average service rate per hour is A. 16 B. 20 C. 25 D. None of the above 7. A small tech support call center experiences an average arrival rate of 8 calls per hour. The one support person can service an average of 10 calls per hour. The probability that a new caller will not have to wait is A. 0.2 B. 0.8 C. 1.0 D. None of the above 8. From the queueing analysis of a small business, it is known that the Utilization factor is 0.6 and that the average time a customer spends in the entire queuing system (waiting line and service point) is 15 minutes. What is the average time in minutes that a customer spends just waiting in line? (Hint! Notice that Wa = 60= A G). What are the formulas for U and for W?) A. 6 minutes B. 9 minutes C. 15 minutes D. None of the above 9. A single person repair business for small appliances has an average arrival rate of 9 jobs per work day and an average service rate of 12 jobs per work day. What is the probability of having 3 jobs in this system (waiting line and service point)? Round to four decimal places. A. 0.1055 B. 0.1407 C. 0.2500 D. 0.7500