The real risk$-$free rate is $2\mathrm{.}50\%,$ investors expect a $3\mathrm{.}50\%$ future inflation rate, the market risk premium is $5\mathrm{.}50\%,$ and Krogh Enterprises has a beta of $1\mathrm{.}40.$ What is the required rate of return on Krogh's stock?

$13\mathrm{.}70\%$

$14\mathrm{.}50\%$

$15\mathrm{.}30\%$

$16\mathrm{.}10\%$

$16\mathrm{.}90\%$