Assume the market value of Vogel's equity, preferred stock and debt are $$7$ billion, $$4$ billion and $$10$ billion respectively. Vogel has a beta of $1\mathrm{.}1,$ the market risk premium is $6\%$ and the risk$-$free rate of interest is $4\%.$ Vogel's preferred stock pays a dividend of $$5$ each year and trades at a price of $$30$ per share. Vogel's debt trades with a yield to maturity of $8\mathrm{.}0\%.$ What is Vogel's weighted average cost of capital if its tax rate is $25\%?($Solve for $R_E,R_p,$ then weights, and finally WACC$).$

$8\mathrm{.}13\%$

$8\mathrm{.}61\%$

$9\mathrm{.}09\%$

$9\mathrm{.}57\%$

$10\mathrm{.}52\%$