Two spheres, each with a charge of 3 microcoulombs, are separated by 9 meters. Given that \(k\) = 9 x 10\({}^{9}\) meters per farad, how much electric potential energy in joules is stored in this combination of charges?

W) 9 x 10\({}^{-6}\)

X) 1 x 10\({}^{-3}\)

Y) 9 x 10\({}^{-3}\)

Z) 9 x 10\({}^{9}\)
Y) 9 x 10\({}^{3}\)