Problem 4
Consider the cascade interconnection of three causal LTI systems, illustrated in Figure (a). The impulse response is and the overall impulse response is as shown in Figure (b).
![](Problem_Template2_clip_image004.gif) ![](Problem_Template2_clip_image005.gif)
Fig (a)
![](Problem_Template2_clip_image006.gif)
Fig (b)
(a) Find the impulse response .
(b) Find the response of the overall system to the input .
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