At time t=0 a 2150 kg rocket in outer space fires an engine that exerts an increasing force on it in the +x−direction. This force obeys the equation Fx=At2, where t is time, and has a magnitude of 893.68 N when t=1.25 s. What impulse does the engine exert on the rocket during the 3.1 s interval starting 2.00 s after the engine is fired?