You've observed the following returns on line computers stock over the past 5 years -27.6 percent, 15.4 percent, 33.8 percent, 3.2 percent, and 22.2 percent

A. What was the arithmetic average return on the stock over this five-year period?

B. What was the variance of the returns over this period?

C. What was the standard deviation of the returns over this period?