The 100-lb crate A is released from rest onto the smooth ramp. After it slides down the...

The 100-lb crate A is released from rest onto the smooth ramp. After it slides down the ramp it strikes the 200-lb crate B that rests against the spring of stiffness k = 600 lb/ft. If the coefficient of restitution between the crates is e = 0.5, determine their velocities just after impact. Also, what is the spring's maximum compression? The spring is originally unstretched.