Question: On the basis of the calibration performance (e.g., R2 and adjusted R2) and the predictive performance (e.g., MAE), the model that includes the interaction between being featured in advertising and being on display performs best. Using what we have done as a starting point, try to improve upon our current model by doing the following: 1) Incorporate the competitive prices into the analysis 2) Incorporate interactions between the brand's price and its other two marketing actions, feature and display