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.Geometric average return = 0.0000%, Estimated standard deviation = 4.89898%.

b.Geometric average return = -0.09012%, Estimated standard deviation = 4.24264%.

c.Geometric average return = -0.09012%, Estimated standard deviation = 4.89898%

d.Geometric average return = 0.0000%, Estimated standard deviation = 4.24264%.

e.None of the above