Suppose the true regression model is Y, B₁ + B₂ X₁ + and it happens that that variance of, of disturbance term for the ith observation is proportional to the value of X₁. To improve the efficiency of the estimation, we define a new variable 2. and obtain a fitted weighted least squares regression: 2=5+0.2+ Fill in the following blanks: 1. The weighted least squares estimator for B₁ is 2. The weighted least squares estimator for B₂ is

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