Two objects and $B)$ of equal mass collide elastically. Mass $A$ is initially moving $4\mathrm{.}5\frac{m}{s}$ in the $+x-$direction prior to the collision. Mass $B$ is initially moving $3\mathrm{.}3\frac{m}{s}$ in the $-x-$direction prior to the collision. After the collision, mass A will be moving with a velocity of $3\mathrm{.}3\frac{m}{s}$ in the $-x-$direction. What will be the velocity of mass $B$ after the collision?

$3\mathrm{.}3\frac{m}{s}$ in the $+x-$direction

$3\mathrm{.}3\frac{m}{s}$ in the $-x-$direction

$4\mathrm{.}5\frac{m}{s}$ in the $+x-$direction

$4\mathrm{.}5\frac{m}{s}$ in the $-x-$direction