Mario Corp. just paid an annual dividend of $$4$ per share, and its dividends are expected to grow at the constant rate of $7\%$ per year. If the share price of Mario Corp. is currently $$79,$ what is the required annual rate of return on Mario Corp.?

a$.10\mathrm{.}80\%$

b$.9\mathrm{.}66\%$

c$.10\mathrm{.}99\%$

d$.12\mathrm{.}32\%$

e$.8\mathrm{.}33\%$

f$.12\mathrm{.}06\%$