You've seen the following returns on a stock over the past five years: 6 percent, 12 percent, 20 percent, -6 percent, and 11 percent. Suppose the average inflation rate over this time period was 2.5 percent and the average T-bill rate was 3.3 percent. What was the average nominal risk premium? 2.0 percent 3.5 percent 5.7 percent 1.2 percent 5.3 percent