please answer questions 9-11 using grade 12 physics formulas

9. How far above the surface of Earth do you need to go for g to be reduced to 0.5 of its value on the surface of Earth? 10.The Kepler's third-law constant of proportionality for the Sun, C3, is 3.4 x 10'8 msfsz. If Earth's radius of orbit is doubled, then Cs would become 1 LKepler's constant for the Sun is C5 = 3.4 x 1013 m3/sz. The average period of orbit for Earth is 365.26 (1. The average radius of Earth's orbit is k =9.00x 10' N . m' / kg2 Ho = 4x x10 T . m/ A e= 1.602x10-"C m. =9.11x10-> kg G = 6.67 x10 "m' kg Is 2 mass of earth = 5.972 x 1024 kg radius of earth = 6371 km