Luther Industries has a dividend yield of $4\mathrm{.}8\%$ and a cost of equity capital of $11\%.$ Luther Industries' dividends are expected to grow at a constant rate indefinitely. The growth rate of Luther's dividends are closest to:

A$.12\mathrm{.}4\%$

B$.5\mathrm{.}6\%$

C$.15\mathrm{.}8\%$

D$.6\mathrm{.}2\%$