a) In digital signal processing, it is important to be able to analyse a signal in time and frequency domain. For the time domain signal below, derive mathematically, from Fourier Transform, the equivalent signal in frequency domain and draw the resultant frequency domain if A=4V and T=100 msup to the third zero crossings.

Additionally, describe the frequency spectra when T =t/4 and draw the resultant spectra up to the third zero crossings. b) Figures below depict a continuous-time signal in time and-frequency domains. Explain the first process required to import the continuous-time signal into the digital domain and-demonstrate this first process for the signal below.

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