A causal LTI system has system function given by the following expression:
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(a) Is this system stable? Explain briefly.
b) Draw the signal flow graph of a parallel form implementation of this system.
(c) Draw the signal flow graph of a cascade form implementation of this system as a cascade of a 1st-order system and a 2nd-order system. Use a transposed direct form II implementation for the 2nd-order system.