Current Attempt in Progress

A $3\mathrm{.}30-kg$ ball, moving to the right at a velocity of $+3\mathrm{.}09\frac{m}{s}$ on a frictionless table, collides head$-$on with a stationary $8\mathrm{.}60-kg$ ball. Find the final velocities of $($a$)$ the $3\mathrm{.}30-kg$ ball and of $($b$)$ the $8\mathrm{.}60-kg$ ball if the collision is elastic. $($c$)$ Find the magnitude and direction of the final velocity of the two balls if the collision is completely inelastic.

$($a$)$ Number $$ Units $$

$($b$)$ Number $$ Units $$

$($c$)$ Number $$ Units $$