In time series analysis, how do the mean absolute percentage error, the mean squared error, and the mean absolute error measure forecast accuracy? Question 5 options: By adjusting the scale of the time series data By predicting the future values and waiting for a specific period of time to determine the accuracy of the predictions By using the current time series value to estimate how well the forecasting method correctly calculates previous values By calculating how well a forecasting method is able to reproduce existing values for time series data