Two football players collide head-on in midair while chasing a pass. The first player has a 101.5 kg mass and an initial velocity of 4.40 m/s, while the second player has a 124 kg mass and initial velocity of -3.2 m/s. What is their velocity (in m/s) just after impact if they cling together? (Indicate the direction with the sign of your answer.) m/s