ces Obtain estimates of quarter relatives for these data using the centered moving average method. ( decimal points and standardize the final seasonal relatives so their total is four.) Quarter Demand Year 1 2 3 4 1 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 16 20 35 49 31 36 65 74 50 52 92 86 61 Quarter 1 2 3 4 1 2 3 4 1 2 3 4 1 Year MA 2 MA Demand/MA2