can you draw this graph and pure ptransition should be include or not

3. A certain hetero-nuclear diatomic molecule has the following properties: B=15.00 cm-, ve=3000 cm Prepare a sketch of the rotational-vibrational absorption spectrum of this molecule at 20 K. (Assume relative populations less than 0.001 to be zero). For the most intense absorption peaks provide the energy of the absorbed photons. Absorption intensity wavenumber (cm')