$(5)$ A hard ball A with velocity $V_A=6\frac{m}{s}$ has a direct collision with ball $B,$ which is at rest. The collision has a coefficient of restitution $e=0\mathrm{.}8.$ Once the two balls collide, Ball B continues moving until it strikes a padded wall and rebounds. The wall collision has coeff. of restitution $e=0\mathrm{.}6.$ Determine the velocity of $B$ after it rebounds from the wall.

Both balls have mass $m=0\mathrm{.}4kg.$

Hint: You need to break this problem up in to two collisions.

The first is when A strikes $B.$ solve for $V_{A2},V_{B2}$

Next look at the collision where $B$ hits the wall $($note this is oblique$).$

solve for $V_{B3}$ and $$

You will need to solve a system of two eqns. two unknowns for each collision.