An electron is trapped in a one-dimensional infinite well and is in its first excited state. The figure below indicates the five longest wavelengths of light that the electron could absorb in transitions from this initial state via a single photon absorption: ?a = 61.34 nm, ?b = 25.56 nm, ?c = 14.61 nm, ?d = 9.59 nm, and ?e = 6.82 nm. What is the width of the potential well?