a Returns for the Dayton Company over the last 3 years are shown below. What's the standard deviation of the firm's returns? (Hint: This is a sample, not a complete population, so the sample standard deviation formula should be used.) Do not round your intermediate calculations. Year Return 1 29.00% -12.50% 2 3 30.00% a. 8.02% b. 24.25% C. 19.80% d. 9.83% e. 34.30%