The state of a harmonic oscillator is given as Ξ¨ =\(\frac{1}{ β3}\) π0 -\(\frac{1}{ β6}\) π1+\(\frac{1}{ β2}\) π2 , where π0, π1 and π2 are the normalized wave functions of ground, first excited, and second excited states, respectively. Which of the following statement(s) is/are true?