\f{b} Develop a th ree-month moving average for this time series. Compute MSE and a forecast for mo nth S. If required, round your answers to two decimal places. Do not round intermediate calculation. The forecast for month 8: E (c) Use a = 0.2 to compute the exponential smoothing values for the time series. Compute MSE and a Forecast for month 8. If required, round your answers to two decimal places. Do not round intermediate calculation. The forecast for month 8: S {d} Compare the threemonth moving average forecast with the exponential smoothing forecast using a = 0.2. Which appears to provide the better forecast based on MSE' - Select your answer - V (e) Use trial and error to nd a value of the exponential smoothing coefcient a that results in the smallest MSE. Do not round intermediate calculations. Use a two-decimal digit precision for the exponential smoothing coefficient