A non-conducting charged sheet and a non-conducting sphere (radius b) are arranged as shown in the figure. The right-most surface of the sheet is at x=0 and the center of the sphere is on the x-axis at x=xnaught. The sheet has a positive uniform charge density ? while the sphere is uniformly charged with total negative charge -q (where q itself is positive). Answer the following questions regarding the electric field E(x) and the electrostatic potential V(x).