Two blocks move along a linear path on a nearly frictionless air track. One block, of mass 0.110 kg, initially moves to the right at a speed of 4.60 m/s, while the second block, of mass 0.220 kg, is initially to the left of the first block and moving to the right at 6.90 m/s. Find the final velocities of the blocks, assuming the collision is elastic.