a. What was the real return on the stock market in each year? b. What was the average real return? c. What was the risk premium in each year? d. What was the average risk premium? Complete this question by entering your answers in the tabs below. What was the real return on the stock market in each year? (Negative answers should be indicated by a minus sign. Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places.)