You've observed the following returns on Crash-n-Burn Computer'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 Crash-n-Burn's stock over this five-year period? (Round your answer to 1 decimal place. (e.g., 32.1)) Average return % b-1What was the variance of Crash-n-Burn's returns over this period? (Round your answer to 5 decimal places. (e.g., 32.16161)) Variance b-2What was the standard deviation of Crash-n-Burn's returns over this period? (Do not round intermediate calculations and round your final answer to 2 decimal places. (e.g., 32.16)) Standard deviation %