When the 5 kg mass is released from rest, it slides down the incline and has a perfectly inelastic collision with the other mass. The coefficient of kinetic friction is 0.15 for the masses on both the incline and the flat floor. How far is the 670 N/m spring compressed when the masses first come to rest?

When the 5 kg mass is released from rest, it slides down the incline and has a perfectly inelastic collision with the other mass. The coefficient of kinetic friction is 0.15 for the masses on both the incline and the flat floor. How far is the 670 N/m spring compressed when the masses first come to rest?