6.67 A signal x(t) has the bandlimited spectrum shown in Fig. P6.67. If x(t) is sampled at 10 samples/s and then passed through an ideal brick-wall lowpass filter with a cutoff frequency of 5 Hz,...

Extracted text: 6.67 A signal x(t) has the bandlimited spectrum shown in Fig. P6.67. If x(t) is sampled at 10 samples/s and then passed through an ideal brick-wall lowpass filter with a cutoff frequency of 5 Hz, sketch the spectrum of the output signal. X(f) f (Hz) -10 10 Figure P6.67: Spectrum of x(t) (Problem 6.67).