Assume this particular case. A drive-through at a local restaurant has 40 customers per hour and has the capacity to handle 60 customers per hour. We will assume the interarrival and service times are exponentially distributed. We will need to use an MM1 queueing model to determine a), on average, how many customers are waiting in line, and b), on average, how long does a customer spend at the restaurant (from time of arrival to time of service is completed)