Two acrobats, Viktor and Valentin, are performing a trick that involves swinging toward each other on separate trapezes. They both release their grip and fly through the air until they collide in midair and lock arms. When they collide, they are at the same height and their velocity vectors are approximately horizontal. At this moment, Viktor (68 kg) is traveling at 3.0m/s to the right and Valentin (54kg) is traveling at 4.7m/s to the left. (a) What is the velocity of the acrobats immediately after they collide? (b) During their second attempt, Viktor is traveling again at 3.0m/s. What velocity should Valentin have so that both acrobats are brought to rest immediately after the collision? (c) During their third attempt, Valentin travels to the left at his original speed of 4.7 m/s. What velocity should Viktor have so that he flips the direction of Valentin's velocity vector? (d) During their final attempt, Valentin travels to the left at his original speed of 4.7 m/s. But Viktor didn't properly time his release of the trapeze, so he is traveling at 0 = 45" below the horizontal with a speed of 3.5m/s. What is the velocity (magnitude and direction) of the acrobats immediately after they collide