For each pair of signals below, sample at the specified rate and find the DTFT of the sampled signals. In each case, explain, by examining the DTFTs of the two signals, why the samples are the same.
(a) x1(t) = 4 cos (16?t) and x2 (t) = 4 cos (76?t) , fs = 30
(b) x1(t) = 6 sinc (8t) and x2 (t) = 6 sinc (8t) cos (400?t) , fs = 100
(c) x1(t) = 9 cos (14?t) and x2 (t) = 9 cos (98?t) , fs = 56
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