solve with excel and showing functions please :)

1 The Victory Plus Mutual Fund of growth stocks has had the following average monthly price for the past 10 months: 3 Month 4 un 5 6 7 8 Fund Price 62.7 63.9 68 66.4 67.2 65.8 68.2 69.3 67.2 70.1 1 2 3 4 5 6 7 8 9 10 9 10 11 12 8 13 14 15 17 Compute the exponentially smoothed forecast with a= 40, the adjusted exponential smoothing forecast 18 with a= 40 and = 30 and the linear trend line forecast. Compare the accuracy of the three forecasts, using 19 cumulative error and MAD, and indicate which forecast appears to be most accurate. 20