Quantization using midriser uniform quantiser

Design a midriser uniform quantizer for this signal by using b bits per sample, where b takes integer values from 1 to 8. Compute signal to quantization noise ratio (SNR) in dB for these values of b. Plot SNR as a function of b. From this plot, measure the (average) improvement in SNR you get for each additional bit you use to quantize the signal.