HW Ch10 Problem 10-9 Calculating Returns and Variability [LO 1) 2 125 points You've observed the following returns on Yamauchi Corporation's stock over the past five years: -26.4 percent, 14.6 percent, 322 percent 2.8 percent, and 21.8 percent. 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 References % a. Arithmetic average return b. Variance Standard deviation C