\fa) A moving aircart collides elastically with a second aircart that is initially at rest and has twice as much mass. b) A moving aircart collides elastically with a second aircart that is initially at rest and has half as much mass. c) The same situation as part a), but this time a completely inelastic collision. d) The same situation as part b), but this time a completely inelastic collision. Summarize your results for this section in a neat table showing a clear comparison of all measured final velocities vs all calculated final velocities. For which of these four collisions would we expect kinetic energy to be conserved? For which of these four collisions would we expect momentum to be conserved