Two particles each with charge +1.66 C are located on the x axis. One is at x = 1.00 m, and the other is at

Two particles each with charge +1.66 µC are located on the x axis. One is at x = 1.00 m, and the other is at x = -1.00 m.
(a) Determine the electric potential on the y axis at y = 0.590 m.
kV

(b) Calculate the change in electric potential energy of the system as a third charged particle of -2.87 µC is brought from infinitely far away to a position on the y axis at y = 0.590 m.