The data file Earnings per Share shows earnings per share of a corporation over a period of 28 years. Compute a simple, centered 7-point moving average series for the corporate earnings data. Based on...

The data file
Earnings per Share
shows earnings per share of a corporation over a period of 28 years. Compute a simple, centered 7-point moving average series for the corporate earnings data. Based on a time plot of the smoothed series, what can be said about its regular components?