QUESTION 1 There is one ATM machine with a single line. Suppose that customers come to the ATM at the rate of 10 per hour and the ATM machine can complete the transaction by each customer in 3 minutes on average. When you arrive at the ATM machine, what is the probability that you do not have to wait? (e.8. no people in the system) 0.25 50 0.75 None of the above QUESTION 2 Based on the problem description above what is the average time spent in the system? (Assume Polsson arrival and exponential service time) 6 minutes 9 minutes 12 minutes None of the above QUESTIONS Based on the problem description in Q1. what is the average time spent in the system? Assume Poisson arrival and constant service time) 4.5 minutes 9.0 minutes 10.5 minutes None of the above