Jim's department at a local department store has tracked the sales of a product over the last five weeks. Period Demand 1 24 2 23 3 25 4 30 5 23 a) What is the forecast for Week 6 based on a weighted moving average applied to the following past demand data and using the weights: 3, 1, and 6? b) Forecast demand using exponential smoothing with an alpha of 0.2, and an initial forecast of 22.0 for period 3. Calculate any two of MAD, MSE, and MAPE