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Common Data for Questions 74, 75:
Let $g(t)=p(t)^{*} p(t)$, where * denotes convolution and $p(t)=u(t)-u(t-1)$ with $u(t)$ being the unit step function

The impulse response of filter matched to the signal $s(t)=g(t)-\delta(t-2)^{*} g(t)$ is given as

1. $s(1-t)$
2. $-s(1-t)$
3. $-s(t)$
4. $s(t)$