During the last 4 years, in sequence, an investment has earned annual returns of 8%, 0%, -8%, and 0% (note the third one is negative). Calculate the geometric average annual return? During the last 4 years, in sequence, an investment has earned annual returns of 6%, 0%, -6%, and 0%. Calculate the geometric average annual return and the estimated standard deviation. a. -0.1659% b. -0.1527% c. -0.1726% d. -0.1604% e. -0.1593% f. 0.000% g. -0.1459%