2 3 5 6 8 9 10 15.3 12 10.4 9.6 10 9.2 13.6 14.6 13.7 12.2 11 12 13 14 15 16 17 18 19 20 15.1 9.8 9.1 15.1 14.2 146 10.2 14.8 8.8 10.8 The accompanying data file contains 20 observations for f and yr b-1. Use the exponential smoothing method to make forecasts with a = 0.2. (Do not round intermediate calculations and round final answers to 2 decimal places.) yt 15.30 14 64 19 13.03 20 12.18 b-2. Compute the resulting MSE and MAD. (Do not round intermediate calculations and round final answers to 2 decimal places.) c-1. Use the exponential smoothing method to make forecasts with a = 0.4. 15.30 13.98 19 13.33 20 11.52 c-2. Compute the resulting MSE and MAD. (Do not round intermediate calculations and round final answers to 2 decimal places.)