Chapter 17, Problem 17.24E

What is the ratio of ground-state nickel atoms (in which $E$ is defined as zero) to nickel atoms that are in the first excited state of $201{\text{cm}}^{-1}$ at $298\text{K}$? (The spectrum of $\text{Ni}$ atoms is complicated by the existence of such an excited state. Does your answer explain why?) Assume the two states have the same degeneracies.