(a) Given the discrete-time functionexpress the bilateral z-transform of this function in...

(a) Given the discrete-time function

express the bilateral z-transform of this function in closed form (not as a power series).

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(b) Find the region of convergence of the transform of Part (a).

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(c) Repeat Parts (a) and (b) for the discrete-time function

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(d) Repeat Parts (a) and (b) for the discrete-time function