Returns for the Alcoff 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.) Select the correct answer. a. 17.04% b. 17.12% c. 17.06% d. 17.08% e. 17.10% Returns for the Alcoff 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.) Select the correct answer. a. 17.04% b. 17.12% c. 17.06% d. 17.08% e. 17.10%