A huge cannon is assembled on an airless planet. The planet has a radius of 5.010^6m and a mass of 2.610^24kg. The cannon fires a projectile straight up at 4900 m/s.

1. What height does the projectile reach above the surface?

2. An observation satellite orbits the planet at a height of 600 km. What is the projectile's speed as it passes the satellite?