PROBLEM 8.3*: Consider the following LTI system: - - y[n] = x[n] 2x [n - 3] + x[n = 6] (a) Find the impulse response h[n] (b) Find the frequency response H(e) (c) Find an equation for the magnitude response |H(e) of the system. Make a carefully labeled plot vs w. (d) Find the system output y[n] when the input is the sinusoidal sequence x[n] = 2 + 0.8 cos (n) + 0.5 cos ( Os (n − 1) + cos (27/³n 2π π ·n+ 3 os – -