Two charges, q1 = +3.0 nC and q2 = −4.0 nC, are located as shown in the figure. Charge q1 is located on the y-axis at y = 6.0 cm. Charge q2 is at x = 8.0 cm, y = 5.0 cm. a) (5) At the origin, draw the electric field vectors created by each of the charges. b) (10) Calculate the magnitudes of the electric fields created by each of the charges at the origin.