A charge of +10.4 micro-Coulombs is placed at the origin of a coordinate system. Another charge of -13.1 micro-Coulombs is placed at x = +0.25 m, y = +0.17 m. A third charge of +10.4 micro-Coulombs is placed at x = -0.25 m, y = 0 m. At what angle is the total electric filed is directed at the the point x = 0 m, y = +0.17 m if measured counter-clockwise from the positive x axis?