Consider the following rates of return: Large- Year Company Stocks 1 3.97% 2 14.34 3 19.23 4 -14.45 -31.94 37.47 US Treasury Bill 6.59% 4.42 4.29 7.32 5.28 5.38 a. Calculate the arithmetic average returns for large-company stocks and T-bills ove this period. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) Large company stocks T-bills % % b. Calculate the standard deviation of the returns for large-company stocks and T-bills over this period. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) % Large company stocks T-bills % c-1 Calculate the observed risk premium in each year for the large-company stocks versus the T-bills. 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.) C-2 Calculate the observed risk premium in each year for the large-company stocks versus the T-bills. 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, e.g., 32.16.) C-1. % Average risk premium Standard deviation C-2 % Next