Question: (a) Find the frequency response H(e j? ) of the linear time-invariant system whose input and output satisfy the difference equation y[n] ? ? y[n

(a) Find the frequency response H(ej?) of the linear time-invariant system whose input and output satisfy the difference equation

y[n] ? ? y[n ? 1] = x[n] + 2x[n ? 1] + x[n ? 2].

(b) Write a difference equation that characterizes a system whose frequency response is?

1- le-jw +e-j3w H(el") =

1- le-jw +e-j3w H(el") =

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