Question #3 One instructor in a dance class is responsible to give instruction to 5 couples learning ball room dancing. The instructor takes .10 hours per couple to instruct, following an exponential distribution. Once instructed the couples can then practice for .45 hours until another instruction is required Instructors are paid $600 per hour. The cost of having a couple wait for instruction is $200 per hour. How many instructors should there be? Question #4 Joe's Limos services dignitaries from around the world. Customers (fairs) arrive at Joes's at a rate of 18 per hour and follow a Poisson arrival rate. One limo can handle 5 customers (fairs) per hour following exponential service times. The cost to operate one limo is $100 per hour, and the cost of having a customer wait is $360 per hour. Please answer the following... a) What are the two costs that we consider in determining total cost? b) How many Limos should Joe have