This binary tree is O$2$ because each node has at most one child $($either left or right$).$This binary tree is linear because each node has at most one child $($cither left or right$).$When we perform an inorder traversal, the nodes are visited in ascending order, demonstrating the linear structure of the tree$$ The fallowing shows a method for inorder traversal private woid inorderReci$($Node root$)[$if $($root l$=$ nulf$)$