Point charge
q1 = 4.5 nC is at position x1 = 3 m, y1 = 4 m.
Point charge
q2 = 4.4 nC is at position x2 = 4 m, y2 = -4 m.

What is the electric potential energy of charge q3 = 4.7 nC at at position x3 = -3 m, y3 = 3 m.

U=


What is the electric potential at point x4 = -4 m, y4 = -2 m?

V=