A point charge q1 is located on the y-axis at r1= a (Y_hat) and another q2 located at the mirror point r2= -a (Y_hat). The charges are not necessarily the same sign or magnitude. Now consider the circular surface S of radius a contained in the x-z plane through the origin. Take the normal vector to this surface to point along the positive y-axis.
a.) Find the flux of the electric field through S.
b.) Use Mathematica to plot the field lines in the y-z plane through the origin for the following three cases: q2=-10q1, q2=q1, and q2=10q1.
I have no idea how to start this problem or how to plug it into mathematica