Problem 2 (25 points) Suppose the time between incoming phone calls to customer service is Exponential with a mean of 5 minutes. And, suppose there are 3 operators and each operator has its own queue. Phone calls will be directed to queues randomly. Operators 1 and 2 respond to calls typically between min=5 to max=20 minutes (Uniformly distributed). The third operator is chattier, and her service takes more time, which is Normally distributed with a mean of 15 and a standard deviation of 3 minutes. Run your model for 6 hours, with 50 replications. a) Report a utilization plot for each operator. Discuss what you learned from the plot. b) Report a waiting time for each operator. Discuss your results. c) Find a 95% confidence interval for the average waiting time for each operator. no data set.