Grant Enterprises's stock is currently selling for $$32\mathrm{.}45$ per share, and the firm expects its per$-$share dividend to be $$1\mathrm{.}38$ in one year. Analysts project the firm's growth rate to be constant at $5\mathrm{.}72\%.$ Estimating the cost of equity using the discounted cash flow $($or dividend growth$)$ approach, what is Grant's cost of internal equity?

$10\mathrm{.}47\%$

$9\mathrm{.}97\%$

$12\mathrm{.}46\%$

$13\mathrm{.}46\%$