What is the formula for Z-transform of na)𝑧(𝑧+1)2(z+1) 2 z​ b)𝑧(𝑧+1)(z+1)z​ c)𝑧(𝑧−1)2(z−1) 2 z​ d)𝑧(𝑧−1)(z−1)z​

I'm sorry, but the question you've asked seems to be incomplete or incorrectly formatted. The Z-transform is a mathematical tool used in signal processing and control theory. It's typically applied to discrete-time signals.

The general formula for the Z-transform is given by:

Z{f(n)} = F(z) = Σ f(n) * z^-n

where:

• f(n) is the discrete-time signal,
• n is the integer-valued time index,
• z is a complex number, and the function F(z) is a complex-valued function of the complex variable z.

However, the specific formulas you're asking for aren't clear. Could you please provide more context or clarify your question?