If 10-year T-bonds have a yield of 6.0%, 10-year corporate bonds yield 8.7%, the maturity risk premium on all 10-year bonds is 1.3%, and corporate bonds have a 0.4% liquidity premium versus a zero liquidity premium for T-bonds, what is the default risk premium on the corporate bond? a. 3.10% b. 2.70% c. 1.004 d. 4.70% e. 2.3096