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1. Compute the DTFT of the following diserete-time signals; plot the amplitude and the phase spectrum for each signal: (a) x[n] = (0.8)u[n] (b) x[n]

1. Compute the DTFT of the following diserete-time signals; plot the amplitude and the phase spectrum for each signal: (a) x[n] = (0.8)"u[n] (b) x[n] = (0.5)" cos 4n u[n] (e) x[n] = n(0.5)"u[n]

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