You've observed the following returns on Crash-n-Burn Computer's stock over the past five years: 6 percent, -14 percent, 29 percent, 17 percent, and 12 percent. What was the arithmetic average return on the company's stock over this five-year period? Average return What was the variance of the company's returns over this period? Variance What was the standard deviation of the company's returns over this period? Standard deviation What was the variance of the company's returns over this period? Variance What was the standard deviation of the company's returns over this period? Standard deviation