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c. Compute all possible forecasts using exponential smoothing with a smoothing coefficient (a) of 0.7. (Negative amounts should be Indicated by a minus sign. Round your answers to 3 decimal places.) Period Demand Exponential Smooth Error Absolute Error 1 20 2 48 3 20 9 17 19 34 10 30 12 23 13 12 14 27 15 d. Compute the MADs for each forecast model. (Round your answers to 3 decimal places.) * Answer is complete but not entirely correct. Average Forecast For an alpha of 0.3, the MAD 6.804 (X For an alpha of 0.7, the MAD 2.900 %b. Compute all possible forecasts using exponential smoothing with a smoothing coefficient (a) of 0.3. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.) x Answer is complete but not entirely correct. Period Demand Exponential Absolute Smooth Error Error 20 2 46 20.000 26.000 26.000 20 27.800 (7.800) 7.800 4 9 25.460 (16.460) 16.460 17 20.522 (3.520) 3.520 6 8 19.465 (11.470) 11.470 19 16.026 2.970 2.970 34 16.918 17.080 17.080 39 22.043 16.960 16.960 10 4 27.130 (23.130) 23.130 11 30 20.191 9.810 9.810 12 23 23.134 (0.130) 0.130 13 12 23.094 1.210 (x 13.090 (x 14 27 19.770 (2.119) x 7.830 x 15 21.516 xRespond to each of the items using the following time series data. Period Demand 20 46 20 9 17 8 19 34 39 10 4 11 30 12 23 13 12 14 27