PROBLEM 7.4.* Consider an LTI system whose frequency response H(e®) is the real-valued function of o shown below: 2, 1 -T -3T 4 4 4 4 (а) Find the system output when the system input is x[n] = (-1)"....

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Extracted text: PROBLEM 7.4.* Consider an LTI system whose frequency response H(e®) is the real-valued function of o shown below: 2, 1 -T -3T 4 4 4 4 (а) Find the system output when the system input is x[n] = (-1)". (b) Find the system output when the system input is: x[n] = 0.1 + 0.2cos(0.2rn) + 0.3cos(0.3rn) + 0.8cos(0.8tn).