1. (15 pts) (Decision trees) Figure 1 shows two possible splits of the training set according to attributes A and B. Black circles and white squares represent class labels (7 black circles and 4 white squares in total). If one writes only the final answer, one will be given zero. We want to know how you reach to a value. O O A B 0 0 Figure 1: Possible splits of training set during the decision tree induction. 1.1 (6 pts) What is the entropy of each split