The table below shows the demand for a particular brand of microwave oven in a department store. Month 2 3 4 5 6 Demand 27 31 29 36 35 42 a) Calculate a two-month weighted moving average for all possible months with weight assigned to oldest in order 0.4, 0.6. b) Apply exponential smoothing with a smoothing constant of 0.7 to derive a forecast for all possible months. c) Which of the two methods would you use to forecast and why