Using the CAPM: if a company's expected return is $12\%,$ it's Beta is $1\mathrm{.}5,$ and the market return is $9\%-$ what is the risk free rate?

Question $7$ options:

$3\mathrm{.}0\%$

$4\%$

$2\mathrm{.}0\%$

$2\mathrm{.}5\%$