Question 7 1 pts The information of a forecasting method, in terms of actual sales and forecasted sales, is given in the table below. 20 23 25 39 30 Actual sales Forecasted sales 21 34 16 36 29 Please calculate the MAD value of the forecasting method. Input should be an exact number. Question 8 1 pts The following is the recent historical sales of Sony HDTV at a local BestBuy store. Feb Mar Month Actual HDTV sales Jan 61 April 76 May 80 94 82 Using weighted moving average method, with weights of 0.5 one period ago, 0.3 two periods ago, and 0.2 three periods ago, to forecast sales for June. Input should be an exact number. Question 9 1 pts The information of a forecasting method, in terms of actual sales and forecasted sales, is given in the table below. 20 29 25 39 31 Actual sales Forecasted sales 17 30 17 36 29 Please calculate the TS value of the forecasting method. Numbers only, keep three decimals if not exact, either round up or down is ok. Question 10 1 pts The following is the recent historical sales of Sony HDTV at a local BestBuy store. Mar May Month Actual HDTV sales Jan 68 Feb 85 April 94 95 97 Use a 4-month simple moving average to forecast sales for June. Input should be an exact number