Given the following information, determine the beta coefficient for Stock Z that is consistent with: $r_z^{}=12\mathrm{.}5\%$;$r_F=4\mathrm{.}0\%$;$r_M=10\mathrm{.}5\%.$

$1\mathrm{.}12$

$1\mathrm{.}42$

$1\mathrm{.}00$

$1\mathrm{.}33$