Calculate the magnitude of the net electric field at the origin due to these two point charges.? 3) a point charge q1=-4.00nc is at the point x=0.60m, y=0.80m , and a second point charge q2=+6.00nc is at the point x=0.60m , y=0. a) calculate the magnitude of the net electric field at the origin due to these two point charges. b) calculate the direction of the net electric field at the origin due to these two point charges. (clockwise from +-x axis)