You've observed the following returns on Crash-n-Burn Computer's stock over the past five years: 6 percent, -15 percent, 20 percent, 33 percent, and 17 percent. Suppose the average inflation rate over this period was 3.9 percent and the average T-bill rate over the period was 4.3 percent. What was the average nominal risk premium on Crash-n-Burn's stock?