Q1 energy no. of times measured a1 n1 a2 n2 a3 n3 a4 n4 expectation value <E> = (a1n1+a2n2+a3n3+a4n4) / (n1+n2+n3+n4) is this correct? Also, how do you caluculate expectation value <E^2> ? i.e. <E squared> Q2 Identify if the following functions are eigenfunctions of the parity operator. a) f(z) = z(a-z)(z+b), where a,b are real numbers b) f(x) = Ψ(x)xΨ(x), where Ψ(x) is antisymmetric about the origin. c) same f(x) in b), but where Ψ(x) is symmetric about the origin. d) f(x) = Ψ(x)x^2Ψ(x) where Ψ(x) is antisymmetric about the origin. x^2 means x squared.