Consider the system of 3 fixed negative charges q = (5.5x10*2) nC, given in the figure. The (x,y) coordinates of the charges are (0,0). (0,d) and (d,d), with the distance d= (6.70x10^-2) m. What is the electric potential energy of this system? Answer in joules () with proper scientific notation. d Note: Your answer is assumed to be reduced to the highest power possible