Let Var(X₁) = Var(X3) = 2, Var(X₂) = 3, Cov(X₁, X₂) = 2, Cov(X2, X3) -2, Cov(X1, X3) = -1. i) Suppose Y₁ = X₁ X₂. Find Var(Y₁). ii) Suppose Y₂ = X₁ − 2X2 – X3. Find Var(Y₂) and Cov(Y₁, Y₂).

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