Consider the following table for a seven-year period: Returns Inflation -1.16% 2.30 U.S. Treasury Bills 3.50% 3.35 4.25 4.67 2.47 1.35 1.08 Year 2 3 4 .62 -6.44 -9.36 1.31 6 What was the average real return for Treasury bills for this time period? Average real return