Consider a digital communication system where an analog signal with a bandwidth of W Hz is sampled and converted into pulse-code modulation (PCM) words. Each PCM word has m bits. Let Vpp and L be the peak-to-peak voltage of the analog signal and the number of quantization levels, respectively. Further, we use Γβ and e to denote the uniform interval between two adjacent quantization levels and the quantization error, respectively. The system is designed such that the maximum quantization error will not exceed a fraction, p, i.e., 10% of the Vpp voltage. Formulate the number of bits per PCM word. (Hint: Find out the number of bits per PCM word in terms of the fraction p).