Below you are given the first four values of a time series. Time Series Value 18 Time Period 1 2 20 25 4 17 Using a 4-period moving average, the forecasted value for period 5 is 2.5 17 20 10 For the following time series, you are given the moving average forecast. Time Period Time Series Value Moving Average Forecast 1 23 17 17 26 19 11 20 23 18 7 17 20 The mean squared error equals 6 41 164