(a) If Earth had a uniform surface charge density of 1.0 electron/m2 (a very artificial assumption), what...

Question:

(a) If Earth had a uniform surface charge density of 1.0 electron/m2 (a very artificial assumption), what would its potential be? (Set V = 0 at infinity.) What would be the
(b) Magnitude and
(c) Direction (radially inward or outward) of the electric field due to Earth just outside its surface?