You've observed the following returns on Yasmin Corporation's stock over the past five years: 19 percent, -13 percent, 16 percent, 21 percent, and 10 percent. a. What was the arithmetic average return on Yasmin'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 Yasmin's returns over this period? (Do not round intermediate calculations. Round your answer to 5 decimal places (e.g., 32.16161).) Variance b-2What was the standard deviation of Yasmin's 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