The market value of Fords' equity, preferred stock, and debt are $$6$ billion, $$2$ billion, and $$15$ billion, respectively. Ford has a beta of $1\mathrm{.}2,$ the market risk premium is $8\%,$ and the risk$-$free rate of interest is $4\%.$ Ford's preferred stock pays a dividend of $$2$ each year and trades at a price of $$30$ per share. Ford's debt trades with a yield to maturity of $8\%.$ What is Ford's weighted average cost of capital if its tax rate is $40\%?$

$8\mathrm{.}71\%$

$7\mathrm{.}62\%$

$7\mathrm{.}26\%$

$7\mathrm{.}98\%$