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Beginning with the question, "What is a transform?" this text presents a complete description of all four forms of the Fourier transform with properties. How to plot complex exponential functions. The forward and inverse Laplace transform for continuous-time signals, and the forward and inverse z transform for discrete-time signals. Insight into the process of finding transforms. Specifically how to estimate the Fourier transform of both continuous-time signals and discrete-time signals from Argand plots of complex exponential signals.