Quantum Mechanical Linear Rigid Rotor model is used to estimate the rotational energies of diatomic molecule with a moment of inertia I about the center of mass. I= R2 where R is the fixed distance between the two atoms and is the reduced mass. The energy operator is just the kinetic operator. a) Write down the Hamiltonian in spherical polar coordinates b) Do not derive, but write down the wavefunctions and corresponding energy levels