thanks in advance please provide answer as early as possible

1. A time series with forecast values and error terms is presented in the following table. The mean absolute deviation (MAD) for this forecast is Answer. (Calculate to two decimal places. X.XX) Month Actual Forecast Error July 5 August 11 5 6 September 13 6.8 6.2 October 6 8.66 -2.66 November 5 7.862 -2.862