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2. For the given baseband signal m(t)=cos1000t 2.1 Sketch the spectrum of m(t) 2.2 Sketch the spectrum of the DSB-SC signal m(t)cos10000t 2.3 Identify the upper sideband (USB) and the lower sideband (LSB) spectra 2.4 Identify the frequencies in the baseband, and the corresponding frequencies in the DSB-SC, USB and LSB spectra. Explain the nature of the frequency shifting in each case