Please help with the bottom half of this problem

Consider the approximate wave function for a particle of mass m in a 1-dimensional box of width a : (x)=a530x(ax) for 0xa and zero otherwise. What is the expectation value for the position of the particle x^=dx(x)x^(x) in the system described by the wave function introduced above? For the same system as in Problem (1), what is the value of the expectation value of the square of the position of the particle? x^2=dx(x)x^2(x)x^2=4x2x^2=72a2x^2=9a3x^2=a25x^2=4a2