Question: Let X 1 , X 2 , and X 3 be uncorrelated random variables, each with mean and variance 2 . Find, in terms of

Let X1,X2, and X3 be uncorrelated random variables, each with mean and variance 2. Find, in terms of and 2, Cov(X1+X2,X2+X3) and Cov(X1+X2,X1X2).

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