A. Yes I solved those with some help from a tutor, but didn't get to the rest of this question because his office hours ended.
B. I used escape velocity=√(2GM/R) to get 3.26*10^-7. I used G=6.67*10^-11, M=1.277*10^14. I wasn't using this previously, because I miscalculated the mass. So, thank...
A. Correct answer is radius = 1770m, acceleration = 2.73*10^-3m/s.
B. I don't know how to approach this problem. I don't know if I should start with forces, energy, or basic kinematics.