Question 5116 marks): 70 cases 30 in class)( 40 in classY 20 cases 50 cases 10 in class X 20 in class X 10 in class Y 30 in class Y In the above decision tree: a) Calculate Gini index for parent and both children Calculate the Gini Index of the split Calculate the Gini Gain Is there improvement in the classification using this split in a decision tree