Suppose we have the following returns for large-company stocks and Treasury bills over a six-year period: US Treasury Bill 5.90% 2.53 3.76 Year Large Company 3.92% 14.18 19.37 -14.31 -31.80 3708 5.42 6.24 a. Calculate the arithmetic average returns for large-company stocks and T-bills over b. Calculate the standard deviation of the returns for large-company stocks and T-bills c-1. Calculate the observed risk premium in each year for the large-company stocks this period. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) over this period. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g. 32.16.) 5 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.g32.16.) 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