Point charges q1 = 2.0uC and q2 = 4.0uC are located at r1 = 4.0*x - 2.0 y and r2 = 8.0"x + 5.0 y. Length units are in meters. (a) What is the force (magnitude and direction) of q2 on q1? (b) What is the electric field (magnitude and direction) at the origin? (c) Place a new point charge, q3 = -1.OuC, along the line connecting q1 and q2, in such a way that the net force on this point charge is zero. What is r13, or the separation distance between q1 and q3