Suppose we have the following returns for large-company stocks and Treasury bills over a six-year period: 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 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.) \begin{tabular}{|l|l|l|} \hline a. Large-company stocks & & % \\ \hline a. T-bills & & % \\ \hline b. Large-company stocks & % \\ \hline b. T-bills & & % \\ \hline c-1. Average risk premium & & % \\ \hline c-2. Standard deviation & & % \\ \hline \end{tabular}