A 50 kg woman skating to the right at 3 m/s skates into a a 20 kg boy travelling 2 m/s to the left. After they meet, they continue skating arm-in-arm on the frictionless ice. a) What is the speed and direction with which the pair moves off after the collision? b) Determine wheter or not the collision is elastic (Show your caluculations). c) Discuss whether or not your answers to parts a) and b) are reasonable. Include specific reasons why you think the answers are or are not reasonable.