A digital filter has the transfer function H[z] given below: H[z] = (z2-1) / (z2- 0.64) A )Is the filter stable, mathema

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A digital filter has the transfer function H[z] given below:
H[z] = (z2-1) /
(z2- 0.64)
A )Is the filter stable, mathematically show why or why not.
B) Draw the canonical realization of the filter
C) Determine the unit impulse response of the filter
D)Is the filter FIR or IIR? Explain why