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. 8. What was the arithmetic average return on the company's stock over this five-year period? (Do not round intermediate calculations and enter your answer as a percent rounded to 1 decimal place, e.g., 321.) b-1. What was the variance of the company's returns over this period? (Do not round Intermediate calculations and round your answer to 5 decimal places, e.g., 16161.) b-2. What was the standard deviation of the company's returns over this period? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32:16.) 96 a. Average return b-1. Variance b-2. Standard deviation