An experimenter seeks to use a sinusoidal potential of the form studied in Example 15.2 to make a one-dimensional trap to confine a number of electrons for further study. She places one electron in the ground state of each potential well. Each electron’s energy should be 0.1 eV and the electron’s tunneling lifetime should be at least five years. Using the approximations developed in Example 15.2, estimate the minimum necessary height of the potential (W/2), the spacing d between minima in the potential, and the root mean square width of each electron’s probability distribution.