The average nominal risk premium is not 5.13. I already try that answer and its incorrect

You've observed the following returns on Yamauchi Corporation's stock over the past five years: -28.2 percent, 15.8 percent, 34.6 percent, 3.4 percent, and 22.4 percent. The average inflation rate over this period was 3.34 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.) a. Average real return b. Average nominal risk premium 6.06% %