You've observed the following returns on crash-n-Burn Computer' stock over the past five years: 12 percent, -12 percent, 19 percent, 24 percent, and 10 percent. What was the arithmetic average return on Crash-n-Burn'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.) What was the variance of Crash-n-Bum's returns over this period? (Do not round intermediate calculations and round your answer to 5 decimal places, e.g., 32.16161.) What was the standard deviation of Crash-n-Bum'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.)