5. The electron energy levels for a hypothetical atom are shown in the diagram below. If an electron is excited to the level with the highest energy, it will make a cascade of downward transitions to reach the ground state, the 0-eV level. What wavelengths, (in nm), could be observed due to these transitions? Note that these transitions make up the emission spectrum of this atom. 3.5 eV Energy 2.5 eV 2.0 eV 0 eV