== 12 Let the process Yд be defined by Y = X + αX-1 where X, is a white noise process (X is a sequence of uncorrelated random variables with zero mean and variance σ2) with autocorrelation R₁(k) so, k=0 5x (S(K) Ο k = 0 and power spectral density S₁₂ (f) =σ², -12-5-½ a) Find the power spectral density, Sy(f), of Y, 11 E[XY] =0 E[X] - FEDO-> E[XY) EDGED]

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