The left figure below shows a nonconducting rod of length L = 6.00 cm and uniform charge density 1 = 3.08 pC/m. Assume that the electric potential is defined to be V = 0 V at infinity. (a) What is V at point P at a distance d = 6.00 cm along the rod's perpendicular bisector? (b) The right figure shows an identical rod except that one half is now negatively charged. Both halves have a linear charge density of magnitude 3.08 pC/m. With V = 0 V at infinity, what is V at P? {c} Does the previous result change if P is moved at twice the distance of the rod? Can you identify an equipotential surface