1 Harlen Industries has a simple forecasting model: Take the actual demand for the same month last year and divide that by the number of fractional weeks in that month. This gives the average weekly demand for that month. This weekly average is used as the weekly forecast for the same month this year. This technique was used to forecast eight weeks for this year, which are shown below along with the actual demand that occurred. 6 points The following eight weeks show the forecast (based on last year) and the demand that actually occurred: T WEEK 1 2 3 4 5 6 7 8 FORECAST DEMAND 139 130 146 144 146 156 150 145 ACTUAL DEMAND 127 123 149 159 179 169 184 205 a. Compute the MAD of forecast errors. (Round your answers to 2 decimal places.) . Answer is complete and correct. Week 1 1 2 MAD 3.00 5.00 3 4 4.33 7.00 12.20 5 6 12.33 7 15.42 21.00 8 b. Using the RSFE, compute the tracking signal. (Round your answers to 2 decimal places. Negative values should be Indicated by a minus sign.) % Answer is not complete. Week Tracking Signal 1 2 3 4 5 6 7 8