Problem 10-16 Calculating Real Returns [LO 1] Consider the following table for a seven-year period: Returns Year U.S. Treasury Bills Inflation 1234567 3.50% -1.16% 3.35 -2.30 4.25 -1.20 4.67 0.62 2.47 -6.44 1.35 -9.36 1.08 -1.31 What was the average real return for Treasury bills for this time period? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Average real retum %