You've observed the following returns on Pine Computer's stock over the past five years. 13 percent. -8 percent, 16 percent, 16 percent, and 10 percent. 0. 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. 32.1.) 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 retums over this period? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g. 32.16.) 9:41% a. Average return b.1. Variance b.2. Standard deviation