An electron is bound in an infinite square$-$well potential $($a box$)$ on the x$-$axis. The width of the

well is L $=3\mathrm{.}8$ nm$.$ In its present state, the normalized wave function of the electron is given by

What is the energy of the electron in this state?

A$.0\mathrm{.}10$ eV

B$.0\mathrm{.}052$ eV

C$.0\mathrm{.}13$ eV

D$.0\mathrm{.}078$ eV

E$.0\mathrm{.}026$ eV