Draw to careful scale an energy-level diagram for hydrogen for levels with n = 1, 2, 3, 4, ∞. Show the following on the diagram: 

(a) The limit of the Lyman series, 

(b) The H_β line, 

(c) The transition between the state whose binding energy (= energy needed to remove the electron from the atom) is 1.51 eV and the state whose excitation energy is 10.2 eV, and 

(d) The longest wavelength line of the Paschen series.