3. Given the data below, apply the "stepwise regression" and "backward elimination algorithms to select the best regression model. Also compute the Mallows Cp for all possible models, and plot the Ce values against p. Compare the results. What is the "correct model? 11 X1 X2 X3 Y 7 26 6 78.5 1 29 15 74.3 56 8 104.3 11 31 8 87.6 7 6 95.9 11 55 9 109.2 3 71 17 102.7 1 31 22 72.5 2 93.1 52 54 18 21 47 4 115.9 1 40 23 83.8 113.3 11 66 9 10 68 8 109.4 3. Given the data below, apply the "stepwise regression" and "backward elimination algorithms to select the best regression model. Also compute the Mallows Cp for all possible models, and plot the Ce values against p. Compare the results. What is the "correct model? 11 X1 X2 X3 Y 7 26 6 78.5 1 29 15 74.3 56 8 104.3 11 31 8 87.6 7 6 95.9 11 55 9 109.2 3 71 17 102.7 1 31 22 72.5 2 93.1 52 54 18 21 47 4 115.9 1 40 23 83.8 113.3 11 66 9 10 68 8 109.4