5 kg ball ofSilly Putty is traveling upward at 32 m/s. It collides in a perfect inelastic collision with another ball of Silly Putty traveling...

A 4.5 kg ball ofSilly Putty © is traveling upward at 32 m/s. It collides in a perfect inelastic collision with another ball of Silly Putty © traveling downward at 16 ml/s and has a mass of 2.4 kg. Neglecting air drag, how high does the combined mass rise above the collision point: Hint - you'll need a couple of conservation laws (momentum & energy)