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Matlab Code:-   clc; clear all; close all; x=input('Enter the sequence: '); N=length(x); Wn=exp((-j*2*pi)/N);%Twiddle factor fprintf('Twiddle Factor=%f+j(%f)\n',real(Wn),imag(Wn)); disp('Magnitude and phase of Twiddle Factor:');     fprintf('|Wn|=%f    ',Wn);     fprintf('angle Wn=%f\n', angle(Wn));  fprintf('\n');  for k=1:N     X(k)=0; end %Calculation of DFT for k=1:N     for n=1:N         X(k)=X(k)+(x(n)*Wn^((k-1)*(n-1)));     end end %Printing the DFT fprintf('DFT of x(n) is:\n'); disp(X); fprintf('\n'); fprintf('X(k)\tMagnitude\tPhase\n\n'); for k=1:N     fprintf('X(%d)\t%f\t%f\n',k-1,X(k),angle(X(k))); end %To plot the magnitude and phase of the DFT subplot(1,2,1); stem(X,'linewidth',1.5); xlabel('k--->'); ylabel('magnitude--->'); title('Magnitude Response'); grid on; subplot(1,2,2); stem(angle(X),'linewidth',1.5); xlabel('k--->'); ylabel('...