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PLEASE ANSWER ASAP     a- Evaluate fft , X(k), of the sequence x(n) defined as x(0)=0.8,...

PLEASE ANSWER ASAP

  1.     a- Evaluate fft , X(k), of the sequence x(n) defined as x(0)=0.8, x(1)=0.4, x(2) = -0.4 and x(3) = -0.2.

b- Verify your calculation using Matlab.

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