First year physics problem?!

if we add a second electron to the He+ ion to form a helium atom, the Bohr model still predicts an ionization energy of -54.4eV (as for He+), since it ignores the Coulomb repulsion between the two electrons. We can correct for this factor, approximately, by adding potential energy, k(e^2)/r, to the electron's total energy. Assume that the electrons orbit on opposite sides of the nucleus, separated by r=2r1. Here, r1 is the radius of the n=1 Bohr orbit for He+. What is your "corrected" value for the helium atom ionization energy?

please show steps! this question is on my review and my exam is soon!

John John John...don't you know the world is going to end next year??
You have no time for all this.