Please answer all questions, with an explanation if possible

Students made these inferences about the vertical velocity of a ball that is thrown into the air from a point on the ground. 1. The ball has its greatest vertical velocity just as it is thrown. 2. The ball has its greatest vertical velocity just at it returns and hits the ground. 3. The ball has its greatest vertical velocity just as it reaches the highest point of its flight 1. Which of these inferences indicate when a thrown ball has its greatest velocity? 1 only B. 2 only C. 3 only D. 1 and 2 only /1 2. The parabolic path that a projectile takes depends on the A. acceleration of gravity and the initial velocity B. acceleration of gravity and the initial horizontal velocity only C. the initial velocity and total flight time D. acceleration of gravity and total flight time /1 3. a) For a projectile, is there a location on its trajectory where the acceleration and velocity vectors are perpendicular? Explain 13 b) For a projectile, is there a location on its trajectory where the acceleration and velocity vectors are parallel? Explain 13 MacBook Air