Following are time-series data for nine time periods. Use exponential smoothing with constants of .3 and .7

Question:

Following are time-series data for nine time periods. Use exponential smoothing with constants of .3 and .7 to forecast time periods 3 through 9.Let the value for time period 1 is the forecast for time period 2.Compute additional forecasts for time periods 4 through 9 using a 3-month moving average. Compute the errors for the forecasts and discuss the size of errors under eachmethod.