Please help. how do i find the MAD and the cumulative error and the tracking signal

3 Additional Problem 03-06 (Algo) Monthly attendance at financial planning seminars for the past 24 months, and forecasts and errors for those months are shown in the following table. Determine if the forecast is working by computing a tracking signal, beginning with month 10 updating MAD with exponential smoothing. Use an alpha value of 0.2. (Round all your calculations to three decimal points) Answer is not complete. Month Altend AT Cum lel MAD 44 1 2 3 4 48 50 50 6 0 50 5 6 0 5 5 42 5 6 7 9 41 6 6 11 16 24 31 32 37 39 100 Forecast 38 48 45 55 50 48 35 21 16 18 34 24 36 57 46 46 41 34 7 -1 50 2 . -90 60 1 26 18 17 25 30 37 70 1 5 20 10 9 6 4 000 10 11 12 13 1 8 49 51 5 0 15 16 17 18 5 0 -10 2 40 36 1 2 9 slo 14 20 17 23