The Potential Energy of a System of Three Equal Charges $\mu$

The potential energy of a system of three equal charges arranged in an equilateral triangle is 0.54 J If the length of one side of this triangle is 33 cm,what is the charge of one of the three charges?

A) 4.3 $\mu$ C
B) 2.0 $\mu$ C
C) 1.7 $\mu$ C
D) 2.6 $\mu$ C
E) 3.7 $\mu$ C