Hello, I need some help with physics. Thank you!

Question 1

A cannon is mounted on wheels and is at rest. It shoots a 5.3 kg ball with a velocity of 8.8 m/s. The cannon has a mass of 7.1 kg. What is the recoil velocity of the cannon? Leave your answer to 1 decimal place.

Question 2

You are coding a 2D NFL game. The player with the ball is 93 kg and is running at (5, 31) px/s. The opponent is 97 kg and runs at (26, 5) px/s to make the tackle. What is the magnitude of the final velocity vector (the scalar speed, so just a number) of both players together immediately after the tackle? Leave your answer accurate to 2 decimal places.

Question 3

You are coding a game like Street Fighter. Player 1 has a mass of 107 kg and is standing still. Player 2 shoots a fireball which successfully damages the other player and delivers an impulse of 1401 kg m/s. How fast will the victim go flying? Leave your answer to 1 decimal place.