Revise your solution to the double-well problem 8.60 so as to treat even and odd functions separately. Do this by introducing a parameter whose value is 1 or 0, depending on whether we are treating the even or the odd wave functions. Calculate the lowest two Hamiltonian eigenvalues using the first 16 even pib functions. Repeat with the lowest 16 odd pib functions. Compare your results with those of Prob. 8.60.