The DTFT of x[n] is X(w). Express the DTFT of following signals using X(w). 1) x1[n]...

  

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The DTFT of x[n] is X(w). Express the DTFT of following signals using X(w). 1) x1[n] = x[1-n] + x[-1-n] 2) x2[n] (n-1)²x[n] {*). 3) x3[n]: = n is even n is odd 4) x4[n] = cos (won) x[n] The DTFT of x[n] is X(w). Express the DTFT of following signals using X(w). 1) x1[n] = x[1-n] + x[-1-n] 2) x2[n] (n-1)²x[n] {*). 3) x3[n]: = n is even n is odd 4) x4[n] = cos (won) x[n]