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Question 3 Let's investigate how transformations of weights affect the estimated coefcients in weighted least squares. Let w be the vector of estimates weights from weighted least squares with weights W. a) Derive Blvd) from weighted least squares with weights dW where d is some non-zero constant. Show the relationship between Blvd) and 3,\". b) Derive 318? ) from weighted least squares with weights W + c where c is some nonzero constant. Show that $55) g 13w