Question 4 (4 points) The annual rates of return of Stock Z for the last four years are 0.10, 0.15, -0.09, and 0.20, respectively. In your written response, please start with question numbers such as a), b) or c) before showing your work and answer to the question. a) Compute the arithmetic mean annual rate of return for Stock Z. (1 point) b) Compute the geometric mean rate of return for Stock Z. (1 point) c) Which mean measure consider beginning and ending value of an investment? Which mean is a measure of an asset's long-term performance. (2 point)