The next two questions are related: 16. an electron is confined in a 3-dimensional rectangular box (v = 0 inside, and v = 8outside) with sides l = 4 nm, 4 nm, and 5 nm. what minimum energy, e_, must a photon havein order to excite the electron out of its ground state. (the electron absorbs the photon.)a. e_ = 0.015 evb. e_ = 0.045 evc. e_ = 0.071 evd. e_ = 0.125 eve. e_ = 0.241 ev17. now we put 10 electrons into the box. assuming the total energy of the system is as low aspossible, and including the effects of spin, how many electrons have the energy of the secondexcited state? a. noneb. 1c. 2d. 4e. all 10