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Consider a signal x(t) = 20 sinc(10t) is to be represented by samples using ideal (impulses)...

Consider a signal x(t) = 20 sinc(10t) is to be represented by samples using ideal (impulses) sampling.
a) Sketch the signal spectral density X(f).
b) Find the minimum sampling frequency that allows reconstruction of x(t) from its samples.
c) Sketch the sampled spectrum Xs(f) in the range [-55, 55] with sampling frequency fs = 25 Hz.

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