Two Point Charges Are Held at the Corners of a Rectangle

Two point charges are held at the corners of a rectangle as shown in the figure. The lengths of sides of the rectangle are 0.050 m and 0.150 m. Assume that the electric potential is defined to be zero at infinity.
-What is the electric potential energy of a +3.0 $\mu$ C charge placed at corner A?

A) 0.10 J
B) 0.18 J
C) 2.3 J
D) 3.6 J
E) zero joules