Ross Assignment Chapter 10 i Saved 8 You've observed the following returns on Yamauchi Corporation's stock over the past five years: -25.8 percent, 14.2 percent, 31.4 percent, 2.6 percent, and 21.6 percent. 10 points a. What was the arithmetic average return on the stock over this five-year period? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. What was the variance of the returns over this period? (Do not round intermediate calculations and round your answer to 6 decimal places, e.g., 32.161616.) C. What was the standard deviation of the returns over this period? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) eBook Print References a. Arithmetic average return % b. Variance C. Standard deviation %