please help

Hudson Marine has been an authorized dealer for C&D marine radios for the past seven years. Suppose the quarterly sales values for the seven years of historical data are as follows. Total Yearly Year Quarter 1 Quarter 2 Quarter 3 Quarter 4 Sales 1 6 15 8 2 31 2 8 20 17 54 3 12 25 21 11 69 4 17 27 24 18 86 5 22 34 26 22 104 6 22 37 29 20 108 7 29 41 34 27 131 a. Compute the centered moving average values (Four-Quarter Moving Average) for this time series (to 3 decimals). Centered Moving Sales Average 15 X 20 17 XXXX XXX 12 10 25 11 21\f1:. Compute the seasonal indexes for the four quarters {to 3 decimals}. Quarter Adjusted Seasonal Index 1 9 2 3 3 C3 4 3 11. When does Hudson Marine experience the largest seasonal effect? Hudson Marine experiences the largest seasonal increase in quarter 8. The largest seasonal effect is the seasonal decrease in quarter (3