A parallel circuit has two resistors with values $R_1=2\mathrm{.}0$ and $R_2=2\mathrm{.}0.$ If the current leaving the battery is $1\mathrm{.}5$ A $,$ what is the potential difference across $R_2?$

$3\mathrm{.}5$ V

$1\mathrm{.}5$ V

$3\mathrm{.}0$ V

$6\mathrm{.}0$ V