Youve observed the following returns on Regina Computers stock over the past five years: 11%, 10%, 19%, 18%, 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 %