Q$-3(30$ pts$)$

A ball $($mass $m=0\mathrm{.}2kg)$ is thrown against a frictionless, vertical wall. Immediately before the ball strikes the wall, its velocity has a magnitude $v=10\frac{m}{s}$ and forms angle of $30$ with the horizontal. Knowing that $e=0\mathrm{.}90,$ determine:

a$.$ the magnitude and direction of the velocity of the ball as it rebounds from the wall.

b$.$ Loss of kinetic energy during impact