Two charges are located on the x axis: q₁ = +1.0 µC at x₁ = +4.0 cm, and q₂ = +1.0 µC at x₂ = -4.0 cm. Two other charges are located on the y axis: q₃ = +3.0 µC at y₃ = +5.0 cm, and q₄ = -8.0 µC at y₄ = +7.0 cm. Find the net electric field (magnitude and direction) at the origin.

magnitude N/C
direction ° (measured counter clockwise from the x axis)