For I2, the harmonic oscillator approximation (force constant k=170 N/m) assumes that the vibrational energy levels are equally spaced. At 300 K, calculate the ratio of molecules in the first excited state compared to the ground state. Also, calculate the proportion of molecules in the second excited state relative to the ground state. The mass of iodine (I) is 126.9 amu. b) At what temperature the population in the first excited state will be half of that in the ground state?