Problem: Three charges exist on an xy-plane: q1 = +6.00 µC is at the origin (x=0, y=0), q2 = +8.20 µC is along the x-axis at x = 0.40 m, and q3 = -5.40 µC is along the y-axis at y = 0.80 m.
Part A: Determine the net force on the charge at the origin due to the other two charges. Specify both magnitude and direction.
Please provide detailed explanation for above problem.