Three pоint chаrges аre fixed in the x-y plаne, as shоwn in the figure. The charges are QA = +[q] × 10-4 C, QB = +[q] × 10-4 C, and QC = –[q] × 10-4 C. The (x, y) cоordinates of each charge are indicated in the figure, with coordinates given in meters. What is the electric potential energy of the system (in J)?