Please provide detailed steps and all parts of the 3 questions.
Thanks!Image text transcribed for accessibility: As discussed in class, for (virtually) every time-domain signal, there is a frequency-domain representation. Such a representation may be called continuous-time Fourier transform, discrete-time Fourier transform, continuous-time Fourier series expansion or discrete-time Fourier series expansion, which depends on the nature of the time-domain signal under consideration. For each of the following signals, determine a proper frequency-domain representation and specify the meaning and unit of any argument (variable) used: where t is the time variable in second. x3[n] = x1(nTs) where n is the variable of all integers and Ts is a constant. x4[n] = x-i(nTs) where Ts is such that T/Ts = N (an integer). x5(t) = x1(t - Delta/2). x6[n] = x4[n - N/2] where N is even. Referring to the previous problem, is there a value of Ts such that xi (t) can be reconstructed from x3[n]? Why? For each of the time-domain signals described previously, determine its magnitude spectrum and its phase spectrum.