For the following data, what is the mean absolute percent error (MAPE) for the 3- period moving average forecast? Period Actual 1 15% 17% 16% 14% 234 SON8 4 5 6 7 12 14 13 15 17 18 15 20 For the following data, what is the 3-period moving average forecast for the 9th period? Period Actual 20.5 1 2 3 4 20 45 5 69 6 15.67 17.67 7 8 12 14 13 15 17 18 15 20 For the following data, what is the exponential smoothing forecast for the 9th period for alpha = 0.25? Period Actual 1 2 3 4 5678 7 8 15.72 16.02 16.32 16.82 12 14 13 15 17 18 15 20