You've observed the following returns on Regina Computer's stock over the past five years: 11%, 10%, 19%, 18%, and 10%.

a. What was the arithmetic average return on Regina's stock over this five-year period? (Round the final answer to 1 decimal place.)

Average return %

b-1. What was the variance of Regina's returns over this period? (Do not round intermediate calculations. Round the final answer to 5 decimal places.)

Variance

b-2. What was the standard deviation of Regina's returns over this period? (Do not round intermediate calculations. Round the final answer to 1 decimal place.)

Standard deviation %