(2) Suppose that the difference equation is given by
y(n) = x(n) - a1y(n-1)
Find the transfer function of the corresponding digital filter.
(3) Given the z-transform of x1 and x2, find x1*x2 using Matlab code given in slide 16
X1(z) = 1 / (1 - az^-1), |z| > |a|.
X2(z) = 1 / (1 - z^-1), |z| > 1.