mework Assignment-Chapter 18 Saved Help Save Et Check 3 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 FORECAST 1 740 2 820 3 920 4 920 5 970 945 ACTUAL 870 970 1,020 870 870 1,020 eBook a. 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.) Hint Week Forecast Actuat Deviation Running Sum of Forecast Errors Absolute Davlation Sum of Absolut Deviation AS Moan Absolute Deviation Tracking Signal 1 740 820 References 2 3 870 970 1,020 870 870 1,020 920 920 970 4 5 6 b. Decide whether the forecasting model you have been using is giving reasonable results. The forecasting model is acceptable The forecasting model is unacceptable Mic araw TH