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Consider the following time series data. b. Show the four-quarter and centered moving average values for this time series (to 3 decimals if necessary). \begin{tabular}{ccccc} Year & Quarter & \begin{tabular}{c} Time Series \\ Value \end{tabular} & \begin{tabular}{c} Four-Quarter \\ Moving Average \end{tabular} & \begin{tabular}{c} Centered Moving \\ Average \end{tabular} \\ \hline 1 & 1 & 6 & \\ & 2 & 1 & \end{tabular} 3 4 2 1 2 3 4 8 3 4 4 4 2 7 8 6 8 (2) 2 (2) 0 (2) (2) 3 8 c. Compute seasonal indexes and adjusted seasonal indexes for the four quarters (to 3 decimals)