You are the pilot of a spaceship (9.1835 × 104 kg) and you enter into elliptical orbit around an uncharted planet, Rosseforp. At periapsis (closest approach to the planet), your ship is 4.5 × 107 m above the surface of the planet; at apoapsis (most distant) it is 2.257×108 m above the surface. The mass of Rosseforp is found by your ship’s equipment to be 1.96×1025 kg, and the period of your ship’s orbit is 83.37 hours

Find the following:i. the semimajor axis of your ship’s orbit, ii. the radius of planet Rosseforp, iii. the eccentricity of your ship’s orbit, iv. the speed of your ship at perihelion and aphelion,