3. 22 - 0.92 a. Find the inverse z transform of X (3) - with ROC: 1->1 z2 -1.8z+1 b. If X(z) is the transfer function for LTI systems, comment on the stability and causality of the above system based on its region of convergence. 4. We are given a signal with mean 0 and amplitude 8V. a. We would like to quantize this signal so that the maximum quantization error is less than 1V. How many bits do we need to represent this signal? b. What is the mean square quantization error? C. If the values 7.2, 3, 5 are measured, find the bits transmitted to represent these values, the values at the receiver and the quantization error for each value receiver. d. What is the average quantization error