A particle of mass M is constrained to move on a circle of radius R on the xy-plane with center at the origin, but is otherwise free. Write the Hamiltonian H in terms of L, where L = -iħ. Construct a complete set of simultaneous, orthonormal eigenfunctions of H and L for -m ≤ m ≤ m. Write the completeness and orthonormality conditions of this set of eigenfunctions using both the Dirac notation and in terms of the functional forms of f(m).