Not sure if there if there is a different formula for nominal...

I did 12+(-12) +19+24+10 / 5

^ don't know if you subtract anything further

Answer 10.60-2.5 = 8.10

Problem 12-11 Calculating Real Rates [LO1] You've observed the following returns on Crash-n-Burn Computer's stock over the past five years: 12 percent, -12 percent, 19 percent, 24 percent, and 10 percent. Suppose the average inflation rate over this period was 2.5 percent and the average T-bill rate over the period was 3.2 percent. What was the average real risk-free rate over this time period? (Do not round intermediate calculations. Enter your answer as a percent nded to 2 deci Average real risk-free rate 10.60 % What was the average real risk premium? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16) Average real risk premium 7.40 %