Could someone help me with these questions, thanks.

Question 1 A rubber ball is shot straight up from the ground at 7.10 m/s. A second rubber ball is simultaneously dropped from rest 1.40 m above the ground. How high above the ground are the balls when they collide? Question 2 Spacex plans to transport humans to Mars, but experienced a few rocket failures while on initial tests. So suppose the rocket to Mars (without people on board - another test flight) liftoffs from earth, from rest, with an acceleration of 55.0 m/s. Unfortunately, after 8.30 s, the rocket experiences a failure and shuts off. It then continues to coast upward (with no appreciable air resistance). What is the maximum height the rocket reaches above the surface