5 Problem 12-8 Risk Premiums (LO2, 3] Suppose we have the following returns for large-company stocks and Treasury bills over a six-year period: nts eBook Year 1 2 3 4 5 6 Large Company 4.00% 14.49 19.33 -14.35 -31.84 37.04 US Treasury Bill 4.62% 4.96 3.88 7.00 5.38 6.43 Print References 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.) 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 ..9.. 32.16.) the observed risk premium in each year for the large company stocks ard deviation of the risk premium over this answer as