Consider the quarterly electricity production for years1-4:
Year 1 2 3 4
Q1 99 120 139 160
Q2 88 108 127 148
Q3 93 111 131 150
Q4 111 130 152 170
(a) Estimate the trend using a centered moving average.PLEASE PROVIDE ANSWER A AND PLOT THE TRENDÂ Â ON ASCATTER PLOT
(b) Using a classical additive decomposition, calculate theseasonal component.
(c) Explain how you handled the end points.
Note: Explain all the steps and computations
