3.2.38 Tree drawing. Add a method drawO to BST that draws BST figures in the style of the text. Hint: Use instance variables to hold node coordinates, and use a recursive method to set the values of these variables. 3.2.38 Tree drawing. Add a method drawO to BST that draws BST figures in the style of the text. Hint: Use instance variables to hold node coordinates, and use a recursive method to set the values of these variables