3. Calculating interest rates The real risk-free rate (r*) is 2.8% and is expected to remain constant. Inflation is expected to be 3% per year for each of the next two years and 2% thereafter. The maturity risk premium (MRP) is determined from the formula: 0.1(t - 1)%, where t is the security's maturity. The liquidity premium (LP) on all National Transmissions Corp.'s bonds is 0.55%. The following table shows the current relationship between bond ratings and default risk premiums (DRP): Rating Default Risk Premium U.S. Treasury AAA 0.60% 0.80% A 1.05% BBB 1.45% National Transmissions Corp. issues seven-year, AA-rated bonds. What is the yield on one of these bonds? Disregard cross-product terms; that is, if averaging is required, use the arithmetic average. 6.44% 7.04% 4.75% 6.49%