Problem 10-9 Calculating Returns and Variability You've observed the following returns on Yasmin Corporation's stock over the past five years: 17 percent, -4 percent, 20 percent, 12 percent, and 10 percent a. What was the arithmetic average return on the company's stock over this five-year period? (Do not round intermediate calculations. Enter your answer as a percent rounded to 1 decimal place, e.g., 32.1.) Average return -% b-1 What was the variance of the company's stock returns over this period? (Do not round intermediate calculations and round your answer to 5 decimal places, e.g., 32.16161.) Variance b-2 What was the standard deviation of the company's stock returns over this period? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Standard deviation -%