Consider the following time series. a) Using a trend projection, forecast the demand for Period 9. b) Calculate the MAD for this forecast. a) The forecasted demand for Period 9 is (Type an integer or decimal rounded to one decimal place as needed.) Consider the following time series. a) Using a trend projection, forecast the demand for Period 9. b) Calculate the MAD for this forecast. a) The forecasted demand for Period 9 is (Type an integer or decimal rounded to one decimal place as needed.)