An analog signal is band limited to 4 kHz. It is sampled at the Nyquist rate and samples are quantized into 4 levels. The quantization levels have probabilities $$\frac{1}{8},\,\frac{1}{8},\,\frac{3}{8}$$  and $$\frac{3}{8}.$$ The information rate of the source is:

A. The same as FDM B. The same as TDM C. A combination of FDM and TDM D. Quite different from FDM and TDM

A. C₂ ≈ 2C₁ B. C₂ ≈ C₁ + B C. C₂ ≈ C₁ + 2B D. C₂ ≈ C₁ + 0.3B

A. 1 and 2 B. 2 and 3 C. 1 and 3 D. None of the above

A. Maximum Likelihood Decoding B. Sequential Decoding C. Both A and B D. None of the above