Three charges are placed in the 3 corners of a rectangle.
q1 = +8µC placed at the leftmost corner of the rectangle
q2 = +2µC placed at 3.0 cm directly below q1
q3 = -4µC placed to the right of q2 at a distance of 6.0 cm

(A) Find the net electric field at the rightmost corner of the rectangle 3.0 cm above q3
and at a distance of 6.0 cm from q1.
(B) Calculate the force exerted in the field by a proton.
(C) Calculate the force exerted in the field by an electron.