Questiоns 1-8 Suppоse thаt yоu аre fitting а subset regression model to a sample of 50 observations. There are K=9 candidate regressors under consideration. The total sum of squares for y is 5000. For the full model, we find that the residual sum of squares is SSE = 800. PRESS for the full model is 1200. You have also found a subset model with 4 regressors for which the residual sum of squares is 850. PRESS for this model is 900. Answer the following questions: