A stock had returns of 15.00 percent. -6.71 percent, and 23.66 percent for the past three years. a. What was the geometric average return for this stock? (Do not round intermediate calculation percent rounded to 2 decimal places, e.g., 32.16.) b. What was the arithmetic average return for this stock? (Do not round intermediate calculations percent rounded to 2 decimal places, e.g., 32.16.) c. What is the variance of the stock's returns? (Do not round intermediate calculations and round e.g., .16161.) a. Geometric average return % b. Arithmetic average return = c. Variance =