QUESTION 9 5 points (This problem description is used for Questions 9, 10, 11, 12 13) The Bumper Car Amusement attractions has a problem of cars becoming disabled and in need of repair Repair personnel can be hired at the rate of $20 per person per hour, but they only work as one team. Thus, if one person is hired, he or she works alone, two or three people work together on the same repair as a team. One repairer can fox cars in an average time of 25 minutes per car. On average, two repairers take 15 minutes and three take 10 minutes to fix a car. Suppose that the service time to fix a car is exponentially distributed for any number of repairers hired. While these cars are down, lost income is 540 per hour per car. Cars tend to break down following a Polsson process (ie, the inter-arrival time is exponentially distributed at the rate of 2 cars per hour. (Hint: model a service team as one server) Find the average/expected waiting time in queue for a broken car if one repairer is hired. 85 minutes 100 minutes 125 minutes 135 minutes 150 minutes 70 minutes QUESTION 10 (This problem description is used for Questions 9, 10, 11, 12 13) The Bumper Car Amusement attractions has a problem of cars becoming disabled and in need of repair. Repair personnel can be hired at the rate of $20 per person per hour, but they only work as one team. Thus, if one person is hired, he or she works alone; two or three people work together on the same repair as a team. One repairer can fix cars in an average time of 25 minutes per car. On average, two repairers take 15 minutes and three take 10 minutes to fix a car. Suppose that the service time to fix a car is exponentially distributed for any number of repairers hired. While these cars are down, lost income is $40 per hour per car. Cars tend to break down following a Poisson process (.e., the inter-arrival time is exponentially distributed at the rate of 2 cars per hour. (Hint: model a service team as one server) Find the total cost (labor cost + lost revenue) per hour if one repairer is hired. $220 $100 $250 O $150 $240 $210