n-1 3.) Given the discrete sequence x(n) = (3) u(n - 1) where u is the...

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n-1 3.) Given the discrete sequence x(n) = (3) u(n - 1) where u is the unit step sequence, do the following: (SHOW ALL WORK) a.) Compute the discrete time Fourier Transform (DTFT) X(w) of x(n). b.) Determine the real and imaginary parts of X(0) n-1 3.) Given the discrete sequence x(n) = (3) u(n - 1) where u is the unit step sequence, do the following: (SHOW ALL WORK) a.) Compute the discrete time Fourier Transform (DTFT) X(w) of x(n). b.) Determine the real and imaginary parts of X(0)