Question: AnLTI filter is a 5 - point running sum described by the difference equation y [ n ] = x [ n ] + x

AnLTI filter is a 5-point running sum described by the difference equation y[n]=x[n]+x[n1]+x[n2]+x[n3]+x[n4](a) Obtain a closed-form expression for the frequency response of this system. 6-10 PROBLEMS 235(b) Determine the frequencies where the frequency response is zero in < .(c) Suppose that the input is x[n]=7+8cos(0.25n)+9cos(0.4n) for

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