A uniform electric field exists everywhere in the x, y plane. This electric field has a magnitude of 6000 N/C and is directed in the positive x direction. A point charge -6.3 × 10-9 C is placed at the origin. Find the magnitude of the net electric field at
(a) x = -0.18 m,
(b) x = +0.18 m, and
(c) y = +0.18 m.