Consider a discrete-time sequence x[n] from which we form two new sequences, where corresponds to sampling x[n] with a sampling period of 2 and corresponds to decimating x[n] by a factor of 2, so that
and
(a) If x[n] is as illustrated in Figure P7.35(a), sketch the sequences
(b) If is as shown in Figure P7.35(b), sketch.
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