Solve #2

1. A tree is a set of nodes connected by edges that indicate the relationships among the nodes. 2. Give the traversal of the following binary tree. Preorder:ARDCEGEH Inorder: D&AGECHF Postorder DRGEHECA Level order: ABCDEFGH 3. Build the binary expression tree for the following input. (2) (7+(2-1)) 8 4. Show the Java generic class BinaryTreeNode that can be used for a node in a binary tree. (3)