Person A:

Weight: 1200 N
Net Impulse for counter movement jump: 240 Ns

Person B:
Weight: 800 N
Net Impulse for counter movement jump: 160 Ns

1) Which person jumped highest?
2)What was kinetic energy of each person right before they left the ground?
3)What was the potential energy of each person at apex of their jump?
4)How long was each person in the air (assuming they jumped and landed at equal heights)?