A manager uses a trend equation plus quarterly relatives to predict demand. Quarter relatives are SR1 = 0.9, SR2=0.95, SR3 = 105, and SR4 = 11. The trend equation is: Ft= 12 + 4t Over the past nine quarters, demand has been as follows: 1 2 3 4 5 Period, t: Demand: 6 7 8 9 15 19 24 27 31 34 38 41 47 Compute the MAD and tracking signal for each period. (Negative values should be indicated by a minus sign. Round your intermediate calculations and final answers to 3 decimal places.) Period, t Demand MAD Tracking signal 15 19 3 24 27 5 31 1 2 4 6 7 8 34 38 41 9 47