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12.45 (w, f) Two independent random variables X and Y have zero means and variances of 1. If they are linearly transformed as W =

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12.45 (w, f) Two independent random variables X and Y have zero means and variances of 1. If they are linearly transformed as W = X + Y, Z = X - Y, find the covariance between the transformed random variables. Are W and Z uncorrected? Are W and Z independent

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