Energy Levels

Using the equation E= -13.60eV*25/n^2 = -340eV/n^2

i) Calculate the energy of the E1, E2, E3 and E∞ energy levels of the hydrogen-like boron ion (express as electronvolts to 3 sig figs).

ii) Calculate energy of the photons corresponding to the lowest energy spectral line that is emitted as a result of transitions down to the E2 energy level of the hydrogen-like boron ion.  In which part of the electromagnetic spectrum would this spectral line occur?

iii) Calculate the energy of the lowest energy photon that the hydrogen-like boron atom could absorb, it is is in its ground state.

iv) In what circumstances would hydrogen-like boron ions absorb photons of even lower energy?