You've observed the following returns on Microsoft stock over the past five years: 15 percent, 3 percent, 18 percent, 11 percent, and - 1 percent. Suppose the average. T-bill rate over this period was 5.6 percerit. What was the average risk premium of this stock over the flve-year period? (Do not round intermediate calculations and enter your answer as a pereent rounded to 2 decimai places, e.9. 32.16.) Numeric Response