Jah stock has an expected return of $18$ percent and a beta of $1\mathrm{.}5.$ Joh stock has an expected return of $9$ percent and a beta of $0\mathrm{.}6.$ Both stocks have the same reward$-$to$-$risk ratio. What is the risk$-$free rate?

$2\mathrm{.}26$ percent

$4\mathrm{.}20$ percent

$3\mathrm{.}00$ percent

$1\mathrm{.}50$ percent