Leroy observed the following returns on Duck-n-Duck's Computer's stock over the past five years: 9 percent, -15 percent, 22 percent, 37 percent, and 18 percent. Suppose the average inflation rate over this period was 3.6 percent and the average T-bill rate over the period was 4.7 percent. What was the average nominal risk premium on Duck-n-Duck's stock? (round 2 decimal)