Harlen Industries has a simple forecasting model: Toke the actual demand for the same month last year and divide that by the number of fractional weeks in that month. This gives the average weekly demand for that month. This weekly average is used as the weekly forecast for the same month this year. This technique was used to forecast eight weeks for this yeor, which are shown below along with the actual demand that occurred. The following eight weeks show the forecast (based on last year) and the demand that actually occurred: a. Compute the MAD of forecast errors. (Round your answers to 2 decimal places.)