Problem 12-9 Calculating Returns and Variability [LO1) You?ve observed the following returns on Crash-n-Burn Computers stock over the past five years; 13 percent, -8 percent, 16 percent, 16 percent, and 10 percent. a. What was the arithmetic average return on Crash-n-Bums stock over this five-year period? (Round your answer to 1 decimal place. (e.g., 32.1)) Average return % b-1 What was the variance of Crash-n-Bum?s returns over this period? (Round your answer to 5 decimal places. (e.g., 32.161 61)) Variance b-2 What was the standard deviation of Crash-n-Bum?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 %