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Question 1 Use MATLAB to find, and to graph. the unit-sequence response of the system displayed below.

1255_unit-sequence response of the system.png

Question 2 A periodic signal x(t) with a fundamental period of 2 seconds is described over one fundamental period by

2056_unit-sequence response of the system1.png

Graph the signal. Then, graph on the same scale the signal xN(t) given by

909_unit-sequence response of the system2.png

For N = 10, 20 and 30 (In each case the time scale of the graph should cover at least two fundamental periods of the original signal).

Question 3 A signal is defined by x[n] = sinc(n/8). Graph the magnitude and phase of the DTFT of x[n - 2].

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