1. A two-dimensional rectangular area of side lengths a and b is surrounded by four bound- aries as shown in the figure below. The vertical boundary at x=a on the right is held at a constant potential of Vo and is isolated from the other three sides, which are held at V = 0. Derive an expression for the electrostatic potential within the rectangular region. y V=0 V=0 V=0 a b V = Vo x