An electron is confined in a 0.4 nm-wide region with a potential energy depth of 14.0 eV. What is the ratio of the penetration distances into the classically forbidden region for the electron in the n =1 and n = 3 states? (Hints: Content in Lecture 10 is required to solve this problem. The penetration distance is the characteristic distance the particles wave function can penetrate into a potential energy barrier.)