A pair of electrons is fixed at certain positions (left(e_{1} ight.) at the origin while (e_{2}) is

A pair of electrons is fixed at certain positions \(\left(e_{1}\right.\) at the origin while \(e_{2}\) is at point \(a\) ) and carries an electric potential energy of \(4.8 \times 10^{-5} \mathrm{~J}\). To move the second charge electron to a different location (point \(b\) ) it requires \(-2.1 \times 10^{-5} \mathrm{~J}\) amount of work. Find the electric potential energy of the pair of electrons when the second electron is at point \(b\).