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Sketch the following equations:

Sketch the following equations:

I. \(\quad \mathrm{X}(\mathrm{n})=U_{r}(\mathrm{n})-U_{r}(\mathrm{n}-3)-4 \mathrm{U}\)

II. \(\quad X(n)=U(n)-U(n+4)+\partial(n-3)\)

III. \(\mathrm{X}(\mathrm{n})=2^{n}[\mathrm{U}(\mathrm{n})-\mathrm{U}(\mathrm{n}-6)]\)

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