A voice signal contains frequencies between 300Hz and 3400Hz. 1) What is the bandwidth of this signal? 2) What should be the minimum sampling frequency for this signal? Assume this signal is sampled at a rate of 8,000 samples per second. We use 256 quantization levels to quantize these samples. 3) How many bits are needed to represent each quantization level? 4) How many bits are generated per second if we use the number of bits per sample you obtained in 3)