onsider the following figure. 8.00 JC 2.00 AC 4.00 MC (a) Find the electric potential, taking zero at infinity, at the upper right corner (the corner without a charge) of the rectangle in the figure. (Let x = 5.90 cm and y = 2.80 cm.) (b) Repeat if the 2.00-JC charge is replaced with a charge of -2.00 JC