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Common Data for Questions 55 and 56:

The amplitude of a random signal is uniformly distributed between $-5 \mathrm{~V}$ and $5 \mathrm{~V}$.

If the signal to quantization noise ratio required in uniformly quantizing the signal is $43.5 \mathrm{~dB}$, the step size of the quantization is approximately

1. $0.0333 \mathrm{~V}$
2. $0.05 \mathrm{~V}$
3. $0.0667 \mathrm{~V}$
4. $0.10 \mathrm{~V}$