The expected return on Karol Co$.$ stock is $18\mathrm{.}5$ percent. If the risk$-$free rate is $5$ percent and the beta of Karol Co is $2\mathrm{.}4,$ then what is the risk premium on the market?

$2\mathrm{.}4\%$

$13\mathrm{.}5\%$

$5\mathrm{.}6\%$

$6\mathrm{.}5\%$