1 1 (a) Using a weight of for the most recent observation, for the second most recent observation, and 2 3 40 for third most recent observation, compute a three-week weighted moving average for the time series. (Round your answers to two decimal places.) Time Series Week Weighted Moving Value Average Forecast 1 17 2 21 3 19 4 23 5 18 6 16 7 8 6 20 18 22 10 20 11 15 12 22 (b) Compute the MSE for the weighted moving average in part (a) (Round your answer to two decimal places)