A cell phone signal x[n] is distorted by multipath reflections off of city buildings. What is received is not x[n] but y[n] where yy[nn] = xx[nn] − 3 4 xx[nn − 1]. Our goal is to compute the inverse filter, g[n], that recovers x[n] from y[n]. In time domain we have the following relationship where h[n] and g[n] are impulse responses with inputs and outputs indicated. a) [5 points] Find the system function H(z) = Y(z)/X(z).