Question 4 decision tree calculation 30 points: For the data below we want a decision tree. What is the first variable/root node (first node to split the data on) using information gain and entropy method. Show all calculations. Target variable is Return Attributes: Past Trend, Open Interest, Trading volume Be careful while same dataset as slides, for this exam question we using information gain and entropy here not the gini index method shown in so all calculations will be different Open Interest Trading Volume High Return Up Low High Low Down Low High Up High High Up Past Trend Positive Negative Positive Positive Negative Positive Negative Negative Positive Positive Low High Down Low Low Down High Down High High Low Down Low Low Down High High Up