A portfolio has a Treynor ratio of $\mathrm{.}034,$ a standard deviation of $10\mathrm{.}3\%,$ a beta of $1\mathrm{.}55,$

and an expected return of $17\mathrm{.}0\%.$ What is the risk$-$free rate?

$11\mathrm{.}31\%$

$10\mathrm{.}28\%$

$12\mathrm{.}35\%$

$12\mathrm{.}59\%$

$11\mathrm{.}73\%$