Using the house selling price data at the text website, describe the predictive power of various models by finding adjusted R2 when (i) size is the sole predictor, (ii) size and new are main-effect predictors, (iii) size, new, and taxes are main-effect predictors, (iv) case (iii) with the addition of the three twoway interaction terms. Of these four, which is the simplest model that seems adequate? Why?