Use Z-transforms to: 2.1 Find the inverse Z-transform of F(2)= 2.2 Solve the second order difference equation +22+1 2² - 1 with n ≥ 0, subject to the initial conditions yo = 2 Yn+22Yn+1 + Yn = cos(wn), for a small w 0 and y₁ = 3/2.