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3.25, Consider the following three continuous-time signals with a fundamental period of T 12: x(t) cos(4π), y(t) sin(4TTI), z(t)x()y(t) (a) Determine the Fourier series coefficients of x( (b) Determine the Fourier series coefficients of y(t) (c) Use the results of parts (a) and (b), along with the multinlication nronerty of the

Please show step-by-step solutions and give
explanations. Thank you!    only a and b

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