You and a fish called Wanda swim and dive together in a deep swimming pool. Discuss similarities and difference on the techniques you and Wanda apply to navigate up and down in the water. Please explain the answer in the comment section

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In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.