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The following function is impossible autocorrelation function of a random process X(t) a. Rx(T) = 10 sinc (20 t) b. Ry(t) = 100 (u(T

The following function is impossible autocorrelation function of a random process X(t) a. Rx(T) = 10 sinc (20 t) b. Ry(t) = 100 (u(T -4)-u(T +4)) O c. None of the mentioned O d. Ry(t) = 20 cos(400 n t)

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