If someone could help me with this, I would really appreciate it so much. Thank you

4. Tom throws Jerry straight up in the air. Jerry is in the air for 2.4 seconds total. (You can assume he leaves and comes back down to the same height or y, and y, = 0 m.) a. Calculate the initial velocity with which Tom threw Jerry. b. Calculate Jerry's maximum height above Tom's hand. (Be careful with your time) 5. Marvin the Martian drops a ball off the rim of a 15 m high cliff on Mars, where the acceleration due to gravity is -3.7 m/s'. (It is lower on Mars than the earth because Mars has less mass. @ ) a. Find the time it will take to hit the surface of Mars. b. Find the final velocity with which the ball hit the ground