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(A) $\text{AM}$ system

(B) SSB system

(C) PCM ( $n$ bit) system

1. $2 B$ (Band width of the modulating signal)
2. $2 \mathrm{~B}$
3. Between $\text{B}$ and $\text{2B}$
4. $2 n \mathrm{~B}$
5. $n \mathrm{~B}$

$\mathrm{V}_{0}(s)=\frac{\mathrm{A}}{s^{2}+1} \operatorname{coth}(\alpha s)$
where $\alpha$ is a constant. Determine the value of $\alpha$