A point charge q1=−4.00nC is at the point x=0.600 meters, y=0.800 meters, and a second point charge q2=+6.00nC is at the point x=0.600 meters, y=0. (A) Calculate the magnitude E of the net electric field at the origin due to these two point charges.(B) What is the direction, relative to the negative x-axis, of the net electric field at the origin due to these two point charges?