Consider a firm in the $40\%$ tax bracket, which just paid a$ $\mathrm{.}47$ dividend to common stockholders. If the firm estimates that the growth rate in dividends will be $6\mathrm{.}25\%$ and the stock is currently selling for $$10\mathrm{.}09$ per share, what is the firm's cost of equity?

$6\mathrm{.}72\%$

$11\mathrm{.}20\%$

$5\mathrm{.}21\%$

$11\mathrm{.}46\%$