b. What is the risk premium standard deviation? I was able to get the rest of the answers except that.

Consider the following table for a period of six years: Returns Year Large-Company Stocks -15.29% -26.65 37.35 24.05 U.S. Treasury Bills 7.41% 8.05 5.99 5.67 5.51 7.82 6.69 Calculate the arithmetic average returms for large-company stocks and T-bills over this time period. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) Arithmetic average returns stock 3.13 % T-bills 6.74 % Calculate the standard deviation of the returns for la percent rounded to 2 decimal places, e.g., 32.16.) y stocks and T-bills over this time period. (Do not round intermediate calculations and enter your answers as a Standard deviation 24.32 % T-bills 1.14 % Calculate the observed risk premium in each year for the large-company stocks versus the T-bills. a. What was the arithmetic average risk premium over this period? (A negative answer should be indicated by a minus sign. Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Average risk premium b. What was the standard deviation of the risk premium over this period? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, -3.62 % e.g, 32.16.) Risk premium standard deviation 26.25 %