The Canadian Space Agency (CSA) is launching a new satellite into space. This satellite will be positioned in a geostationary orbit, 35786km above the Earth's surface. To reach this orbit, the 1450kg satellite will be launched into space on a rocket with a mass of 137000kg (not including the mass of the satellite). When the rocket launches, it will rapidly gain speed before the main engines shut off 4.5minutes into flight. At this point the rocket will be 125km above the Earth's surface and traveling at 4500m/s. What power was demonstrated by the main engines by the time it shut off? (assume that mass is constant)