3. Are all of the independent variables in the model significant? If not, which are not and why? Use alpha=0.05.The following output is associated with a multiple regression model with three independent variables: Coefficients Standard Error t-statistics p-value Intercepts 87.790 25.468 3.447 0.002 X1 0.970 0.586 -1.656 0.113 X2 0.002 0.001 3.133 0.005 X3 -8.723 7.495 -1.164 0.258 1. Write the regression model associated with this data? 2. 2. How much a of change in the dependent variable will be associated with a one unit change in X2? In X3