You've observed the following returns on Yamauchi Corporation's stock over the past five years: -28.8 percent, 16.2 percent, 35.4 percent, 3.6 percent, and 22.6 percent. The average inflation rate over this period was 3.36 percent and the average T-bill rate over the period was 4.3 percent. a. What was the average real return on the stock? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. What was the average nominal risk premium on the stock? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Answer is complete but not entirely correct. a. 9.80 X % Average real return Average nominal risk premium b. 24.44 %