If $10-$year T$-$bonds have a yield of $6\mathrm{.}2\%,10-$year corporate bonds yield $12\%,$ the maturity risk premium on all $10-$year bonds is $1\mathrm{.}3\%,$ and corporate bonds have a $0\mathrm{.}4\%$ liquidity premium versus a zero liquidity premium for T$-$bonds, what is the default risk premium on the corporate bond?

Select the correct answer.

a$.5\mathrm{.}80\%$

b$.5\mathrm{.}60\%$

c$.5\mathrm{.}00\%$

d$.5\mathrm{.}40\%$

e$.5\mathrm{.}20\%$