Youve observed the following returns on Regina Computers stock over the past five years: 10%, 11%, 18%, 19%, and 10%. a. What was the arithmetic average return on Reginas stock over this five-year period? (Round the final answer to 1 decimal place.)

Average return ______%

b-1. What was the variance of Reginas 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 Reginas returns over this period? (Do not round intermediate calculations. Round the final answer to 1 decimal place.)

Standard deviation _____%