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The block diagram of a causal LTI system is given below. In bo -1 a2 a1 a) (2) Write down the difference equation relating x[n] and y[n]. b) (2) Find its system function. If a1 1.1 , -0.24 , bo 3, b,--1.9 , and b2:0, c) (2) Sketch the pole-zero plot and specify the ROC. d) (2) Is it FIR filter or lIR filter ? Explain your answer using the ROC. e) (2) Is it a stable system ? Explain your answer using the ROC