(a) Sketch the field lines for the configuration of charges shown below. I drew one to get you started. Make sure that you are consistent with the number of field lines that you attach to each charge. Think about what the field should look like (how many field lines there should be) far away from the charges. +2q (b) In the previous question, assume the -q charge is located at 2 = D and the +2q is located at *=-D. What is a fourth order approximation to the electric field E(0, y,0) for points far away on the y-axis, i.e. ly D? Write your exact answer in terms of the small quantity = D/y and use a Taylor series expansion, keeping terms out to e. Check (show us!) that the units of your answer are correct, that the direction of your E-field makes sense, and that the limiting behavior (y) makes sense.