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If the signal $x(t) = \large \frac{\sin(t)}{\pi t}$$*$$\large \frac{\sin(t)}{\pi t}$ with $*$ denoting the convolution operation, then $x(t)$ is equal to

1. $\large\frac{\sin(t)}{\pi t}$
2. $\large\frac{\sin(2t)}{2\pi t}$
3. $\large\frac{2\sin(t)}{\pi t}$
4. $\bigg(\frac{\sin(t)}{\pi t}\bigg)^2$

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