Consider the following double log equation (standard errors in parenthesis): InY = 212.6+0.326lnX + 0.056/nX2 +0.0371nX3 +0.4641nX4 (0.046) R = 0.74 (a) Interpret the coefficients of X and X4 (0.028) N=250 (0.017) (0.082) F-statistic= 66.8 (4) (6) (4) (b) Calculate the 95% Confidence Interval (CI) for the coefficients of X1 and X3 (c) Perform the F-Test for the joint significance of all the coefficients in the model (d) What is the likelihood of finding heteroscedasticity in such a model? Test for the presence of heteroscedasticity given the following information: R of auxiliary equation = 0.736