MM2 has a queuing problem where customers who line up to pay their selections form the waiting line. The MM system consists of an arrival rate of 12 per hour according to a Poisson distribution, and service times are on average equal to 4 minutes per customer. What is the number of customers waiting in the queue on average? a. 0.152 Ob.4.0 O c. 0.333 d.3.2 e. 0.952 QUESTION 4 Which time-series model uses BOTH past forecasts and past demand data to generate a new forecast? exponential smoothing nave O trend projection weighted moving average moving average 3 poin