Return to Problem 3-20 (Static) In this problem, you are to test the validity of your forecasting model Here are the forecasts for a model you have been using and the actual demands that occurred: WEEK 1 2 3 4 5 6 FORECAST 800 850 950 950 1,000 975 ACTUAL 900 1,000 1.050 900 90 1,100 2. Use the method stated in the text to compute the MAD and tracking signal for each week (Negative values should be indicated by a minus sign. Round your "Tracking Signal" to 1 decimal place and all other answers to the nearest whole number.) * Answer is not complete. Week Forecast Actual Deviation RSFE Absolute Deviation Sum of Absolute Deviation MAD TS 1 800 900 100 2 850 150 LON 1,000 1,050 900 900 950 950 1.000 975 100 50 OOOOOO 5 100 6 1.100 125