The accompanying data file contains 10 observations for t and yt. Bpicture Click here for the Excel Data File A 3-period moving average is plotted along with the actual series. . Comment on smoothing. The jagged graph represents the oniginal series and the smoother graph represents its 3-period moving average The smoother graph represents the original series and the jagged graph represents its 3 -period moving overage We cannot tell which graph represents the original serles and which its 3-period moving average. b-1. Use the 3.period moving average to make in-sample forecosts. (Do not round intermediate calculations and round final answers to 2 decimal places.) b-2. Compute the resulting MSE and MAD. (Do not round intermediate calculations and round final answers to 2 decimal places.) c. Make o forecast for period 11. (Do not round intermediate calculations and round final answers to 2 decimal places.)