1. Suppose for PCM, we have an A/D convertor in which each symbol is represented by 4 bits. The PAM signal we received after sampling has the following amplitudes:

4.2, 6.7, 9.9, 12.1,15.3 ,11.4 , 6.5, 2.7, -0.64, -4.6, -9.0, -4.1, 2.5, 5.7, 7.3, 8.8

Find the followings

• # of levels
• Spacing between levels (assuming uniform quantization)
• Quantized value of each sample
• Quantization error

Digital data as the output