Hi can you please help me with this

Problem 2: A person throw a ball with a speed on = 20 rn/sec, at an angle of 60 above the horizontal1 and 1 In above the ground. Another person is 15 In in-front on the ball. This person is running at a constant speed 1; to catch the ball [ox = 0). After some time t, this person catches the ball 1 In above the ground. (a) What is the time t that the ball is in the air? (13) At what constant speed a: must the person run to catch the ball? Time t = 0 Time t