Table 2. The manager of Carpet City outlet store needs to be able to forecast accurately demand for Soft Shang carpet. Demand for the past 20 weeks appears in table 1 below week Deman d 20 2 28 3 22 4 18 5 22 6 22 7 22 8 26 9 23 10 23 11 23 12 27 113 25 14 22 15 23 16 17 18 678 14 14 15 19 11 20 16 21 22 23 24 Forecast Error Abs.Dev SQ Error APE Using the exponential smoothing forecasting techniques with a = .40. a). Compute the exponentially smoothed forecast average without trend: Use this formula F= a(A)+(1- ) F-1 to calculate separately the forecast for all the required weeks in the table provided, before inserting the answers from your calculations in the forecast column of the table. b). Calculate the Mean Absolute Deviation (MAD). c). Mean Square Error (MSE). d). Mean Absolute Percentage Error (MAPE).