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Suppose we have the following returns for large-company stocks and Treasury bills over a six-year period: Year Large Company US Treasury Bill 1 3.66% 4.66% 2 14.44 2.33 3 19.03 4.12 -14.65 5.88 5 -32.14 4.90 6 37.27 6.33 4. a. Calculate the arithmetic average 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.) 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.) c-1. Calculate the observed risk premium in each year for the large-company stocks versus the T-bills. What was the 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.) a. Large-company stocks T-bills b. Large-company stocks T-bills c-1. Average risk premium 4.66% % %