HW 3 Saved Help Save & Exit Submit Check my work Problem 3-28 The manager of a travel agency has been using a seasonally adjusted forecast to predict demand for packaged tours. The actual and predicted values are as follows: points Period Demand Predicted 129 113 189 200 149 150 102 eBook 80 124 Hint WNOWN 119 136 101 156 111 135 128 124 109 150 94 80 140 128 Ask 96 131 141 References a. Compute MAD for the fifth period, then update it period by period using exponential smoothing with a = .05. (Round your intermediate calculations and final answers to 3 decimal places.) Period MADE Demand 129 189 149 NovaWN 124 119 136 101 156 111 96 131 141 b. Compute a tracking signal for periods 5 through 14 using the initial and updated MADs. (Negative values should be indicated by a minus sign. Round your intermediate calculations and final answers to 3 decimal places.) Period Tracking Signal NovaWN Demand 129 189 149 84 79 124 119 136 101 156 111 96 131 141