A 5.6-µC point charge is located at x = 1.2 m, y = 3.2 m, and a -4.2-µC point charge is located at x = 1.9 m, y = -2.3 m.
(a) Find the magnitude and direction of the electric field at x = -2.7 m, y = 1.1 m.
(b) Find the magnitude and direction of the force on a proton at x = -2.7 m, y = 1.1 m.