Problem 7-12 Calculating Real Rates of Return [104] Treasury bills are currently paying 6 percent and the inflation rate is 2.8 percent. a. What is the approximate real rate of interest? (Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. What is the exact real rate? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) a. Approximate real rate b. Exact real rate