Note to players: two answers required. Monomials of these two quantities are symmetrized in the Weyl ordering rule. A closed line integral of one of these quantities with respect to the other must equal nh in the Wilson–Sommerfeld quantization condition; that expression also defines the actions in action-angle coordinates. The expectations of these two quantities follow classical orbits according to Ehrenfest’s theorem. In either of these quantities’ eigenbasis, the other’s operator is given by negative i-times-h-bar (10[1])times a partial derivative. Derivatives of the Hamiltonian with respect to these two quantities appear in Hamilton’s equations. The product of the standard deviations of these two quantities is bounded below by h-bar over 2 according to Heisenberg’s uncertainty principle. For 10 points, give these two quantities symbolized x and p. ■END■