For a 1D harmonic oscillator, calculate:
(i) the expectation value of energy, and
(ii) the time evolution of the expectation values of the coordinate and momentum, provided that in the initial moment (t=0) it was in the state described by the following ket-vector:
∣α⟩=21(∣31⟩+∣32⟩)
where ∣n⟩ are the ket-vectors of the stationary (Fock) states of the oscillator.