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  3. questions 1 consider the signal shown in the figure below...

Question: questions 1 consider the signal shown in the figure below...

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QUESTIONS 1. Consider the signal shown in the figure below. 0 a. Sketch the signal x (t 2). (3 puan). b. Sketch the signal x t + 2). 8 puan). 2. Determine whether or not the following signals are periodic, and if periodic, give their periods in seconds and frequency in hertz. a. x(t) 15. 6 Cos (250rt-)( points) b. Х(n):: 12.4 Cos (Vzn). (3 points). c. x(n)-3.45 sin(n). (3 points). 4 . 3. Determine whether or not the LTI systems with the following impulse responses are causal and stable. Note that simply writing causal /noncausal, or stable / unstable is not enough, the verification of your answers are required to gain points from this question. (15 puan). a, h(n)-# (-2) u(n) + (0.9) u(n-1) c. h(t)- eu(5-t).

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