Just 11 and 12 please

11. The correct formula for a k period moving average is a. c. d. 12. Why might a forecaster calculate MSE values on just the most recent data in the time-series data set? a. The forecaster might be interested in how well the forecasting method performs on the more recent dat b. Because the most recent data may be a better predictor of future values. c. Because the resulting forecasting function might fit the older data better that the more recent data. d. All of these. ge 2 of 4 Focus