Two independent methods of forecasting based on judgment and experience have been prepared each month for the past 10 months. The forecasts and actual sales are as follows: -5 Month 1 2 3 4 5 6 7 8 9 10 Sales 771 790 794 776 772 770 761 774 792 794 Forecast 1 769 790 798 779 770 773 765 775 791 794 Forecast 2 769 790 797 780 772 775 766 774 789 795 a. Compute a tracking signal for the 10th month for each forecast using the cumulative error for months 1 to 10. Use action limits of + 4. Is there bias present? (Do not round your intermediate calculations. Round your answers to 2 decimal places. Negative amounts should be indicated by a minus sign.) Forecast Tracking Signal Bias Method 1 Method 2 (Cick to select) Present Not present es a. Compute a tracking signal for the 10th month for each forecast using the cumulative error for months 1 to 10. Use action limits of +4. Is there bias present? (Do not round your intermediate calculations. Round your answers to 2 decimal places. Negative amounts should be indicated by a minus sign.) Forecast Tracking Bias Signal Method 1 (Click to select Method 2 (Click to select) Present Not present b. Compute 2s control limits for each forecast. (Do not round your intermediate calculations. Round your answers to 2 decimal places.) Control Limits Forecast Method 1 Method 2