A manager uses a trend equation plus quarterly relatives to predict demand. Quarter relatives are SR1=0.9,SR2=0.95,SR3=1.05, and SR4=1.1. The trend equation Is: Ft=7+5t. Over the past nine quarters, demand has been as follows: Click here for the Excel Data File Compute the MAD and tracking signal for each perlod. (Negatlve values should be Indlcated by a minus sign. Round your Intermedlate calculations and final answers to 3 decimal places.)