At a distance r away from a point charge q, the electric potential is V = 600 V and the magnitude of the electric field is E = 200 N/C. Determine the value of q and r.

2.) Over a certain region of space, the electric potential is given by:

V = 3x^2 - 2xy + xyz

Find the expressions for the x, y, and z components of the electric field over this region, which has coordinates in meters (2, -1, 2)?