You are considering an investment in a AAA-rated U.S. corporate bond but you are not sure what rate of interest it should pay. Assume that the real risk-free rate of interest is 1.0%; inflation is expected to be 2.0%; the maturity risk premium is 2.0%; and, the default risk premium for AAA rated corporate bonds is 4.5%. What rate of interest should the U.S. corporate bond pay? Assume that the liquidity premium for a AAA-rated U.S. corporate bond is zero.