Quantum Mechanics Question. Thank you

5. "Hydrogen atom" (Sec. 7.1) The energy eigenvalue of the electron in the hydrogen atom is given by 2n2 m(ac) (n = 1,2,3,...) Here, 1 mc? = 5.11 x 10 eV 137) c=3.00 x 10 m, c = 1.97 x 10-ev.m. (a) Calculate the wavelength of the radiation emitted by the transi- tion from n = 5 to n = 3 (in the unit of meter). (b) Calculate the expectation values of L and L3 for the state (n,1,m) = (3,2,1)