Physics problem on rotation, physics homework help

A 3kg steel ball attached to a string is given an initial velocity of 1.8m/s and swings through an angle of 60 degrees, colliding with a 4kg steel cube also suspended by a string, initially at rest
if the two collide elastically what will be the maximum height reached by the sphere and the cube after the collision
if the two collide inellastically with a coefficient restitution of .60, what will be the velocity immediatly after the collision
if the two collide totally inelasticaly what will be the velocity immediatly after the collision?

 
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