The space probe is traveling in outer space having a momentum which consists of a magnitude of 7.70 107 kg • m/s. A retro-rocket is fired to slow down the probe. It exerts a force to the probe that consists of a magnitude of 2.20 x 106 N and a direction opposite to the probe's motion. It fires for a period of 11 s. Find out the momentum of the probe following the retrorocket ceases to fire.