X is multivariate Gaussian with Hx= [6 8 ]and C₁ n 6 0 8 and and covariance matrix of Y 1 = x1 - x2 2 = x1 + x₂ - 2x3 Y3 = X1 + X3 1/2 1/4 1/3 2 2/3 1/4 = 1/3 2/3 1 = [y₁ y3] у1 у2 уз Find the mean vector where

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