(a) Determine which of the given signals are periodic:
(i) x[n] = cos(πn)
(ii) x[n] = –3 sin(0.01πn)
(iii) x[n] = cos(3πn/2 + π)
(iv) x[n] = sin(3.15n)
(v) x[n] = 1 + cos(πn/2)
(vi) x[n] = sin(3.15πn)
(b) For those signals in Part (a) that are periodic, determine the number of samples per period.
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