Two blocks with masses 0.44 kg (A) and 0.729 kg (B) sit on a frictionless surface. Between them is a spring with spring constant 29.6 N/m, which is not attached to either block The two blocks are pushed together, compressing the spring by 0.253 meter, after which the system is released from rest. What is the final speed of the block A? (Hint: you will need to use both conservation of energy and conservation of momentum to solve this problem).