At step 5 on page 3-60, look at the average square error plot. What other value for the number of leaves looks promising? At step 6 of page 3-60, copy the 'variable importance' report and paste here. See page 3-16 and explain which inputs are important for predicting which students will not return to school. At step 7 of page 3-60, paste the counts of FN, TN, FP, TP for training and validation sets here. You will be using these numbers in Part IV