6 1 points Skipped eBook Exercise 8-4 Algo The accompanying data file contains 20 observations on the response variable y along with the predictor variables x, d, and d. pictureClick here for the Excel Data File a. Estimate a regression model with the predictor variables x, d, and d, and then extend it to also include the interaction variable dd2. What is the estimated regression coefficient for the predictor variable x in both models? Note: Negative values should be indicated by a minus sign. Round your answers to 2 decimal places. Model 1 (No Interaction) Model 2 (Interaction) Hint References b-1. Which is the preferred model for making predictions? since it has the b-2. Use the preferred model to predict y. Note: Round coefficient estimates to at least 4 decimal places and final answers to 2 decimal places. Predicted y Predictor Variables x = 20, d = 1, d2 = 0 x=20, d = 1, d2 = 1