Wave Functions & Expectation Values

a) For a particle in a 1-dimensional box confined between 0 a) The initial state of a particle is given by
phi = phi_1 + 3phi_2 + 2phi_3 (all phi's are functions of x). Normalize this wave function.
b) If no energy measurements are made what is the expectation value of energy of this state at a later time t?
c) Is this expectation value of energy an energy eigenvalues of this system? Why or why not?