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In the figure $m(t)=\frac{2 \sin 2 \pi t}{t}, s(t)=\cos 200 \pi t$ and $n(t)$ $=\frac{\sin 199 \pi t}{t}$. The output $y(t)$ will be

  1. $\frac{\sin 2 \pi t}{t}$
  2. $\frac{\sin 2 \pi t}{t}+\frac{\sin \pi t}{t} \cos 3 \pi t$
  3. $\frac{\sin 2 \pi t}{t}+\frac{\sin 0.5 \pi t}{t} \cos 1.5 \pi t$
  4. $\frac{\sin 2 \pi t}{t}+\frac{\sin \pi t}{t} \cos 0.75 \pi t$

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