1. [4 points] Suppose the regression model is semi-logarithmic: log(Y) = B1 + B2X + u. The estimate of B2 is 0.3. What is the interpretation of this coefficient? 2. [4 points] Suppose the regression model has a quadratic term: Y = 1+ B2X+B&X2 +u. The estimate of 32 is 0.3. What is the interpretation of this coefficient? 3. [4 points] Suppose the regression model has an interactive term: Y = B1 + B2X2 + B3X3 + B4X2X3 + u. The estimate of 32 is 0.3. What is the interpretation of this coefficient