Google stock price. The following time series graph shows daily closing stock prices (adjusted for splits and dividends) for Google, Inc., from January 1, 2008, through June 21, 2013 (Source: Yahoo! Finance).

a) Which time series components are evident?
Single exponential smoothing (SES) models were found for these data. Examine the following time series graphs showing two different smoothing coefficients values (a = 0.2 and a = 0.8).

b) In which graph is a larger value of a used?