Given the following difference equation: y [n + 2] - y [n] = x [n + 2] + x [n] with initial conditions y [-1] = 1, y [-2] = 1/2 and x [n] = nu [n] (a) Find the solution of the difference equation analyatically (b) Use matlab to sketch the answer of part (a) (c) Use iterative method in matlab to solve the equation "C3.3" (d) Compare the answer of both parts in (a) and (c)