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The impulse response $g(t)$ of a system, $G$, is as shown in Figure $(a)$. What is the maximum value attained by the impulse response of two cascaded blocks of $G$ as shown in Figure $(b)$?

  1. $\dfrac{2}{3} \\$
  2. $\dfrac{3}{4} \\$
  3. $\dfrac{4}{5} \\$
  4. $1$

 

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