The following table displays a record of sales of a certain product over five weeks: Units Sold Week 1 6 2 8 3 5 4 9 5 12 Using the nave forecasting method, generate forecasts for weeks 2-5 and calculate the following three accuracy metrics for your forecasting model: a. Mean Forecast Error (MFE): b. Mean Absolute Error (MAE): C. Root Mean Squared Error (RMSE)