1.11 Let x(t) =t[u(t) – u(t – 1)], we would like to consider its expanded and compressed versions. (a) Plot x(2t) and determine if it is a compressed or expanded version of x(t). (b) Plot x(t/2) and...

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Extracted text: 1.11 Let x(t) =t[u(t) – u(t – 1)], we would like to consider its expanded and compressed versions. (a) Plot x(2t) and determine if it is a compressed or expanded version of x(t). (b) Plot x(t/2) and determine if it is a compressed or expanded version of x(t). (c) Suppose r (t) is an acoustic signal, e.g., a music signal recorded in a magnetic tape, what would be a possible application of the expanding and compression operations? Explain. Answers: (a) x(2t) = 21[u(1) – u(t – 0.5)], compressed.