Please answer the question below.

Two blocks with masses 0.377 kg (A) and 0.811 kg (B) sit on a frictionless surface. Between them is a spring with spring constant 28.4 N/m, which is not attached to either block The two blocks are pushed together, compressing the spring from its equilibrium length by 0.276 meter. The system is then released from rest. What is the final speed of the block A after it loses contact with the spring? (Hint: you will need to use both conservation of energy AND conservation of momentum to solve this problem). Image size: s M L Max A B