Problem 4: Discreite Fourier Transform and Convolution using Matlab Choose 3 questions among 6 questions below. Submit your M code for each question and plots if requirested 1. Implement your own Matlab function named dft0 that does the DFT operation for any r(n) signal with window N. Refer to the general DFT equation: N-1 2. Compute the discrete-time Fourier transform and plot its magnitude and phase for the signal (exactly locate the signal in the overall froquency r(n), then
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