<prompt> Kutokana na Java code yafuatayo kwa ajili ya preorder DFS, kuandika upya variable na kazi majina, hivyo inakuwa wazi zaidi.class Solution public List fTreeNode r List lnew ArrayList; por,l; return l; public void poTreeNode r,List l ifrnull return ; l.addr.val; por.left,list; por.right,list;  <response>: Heres the rewritten code with clearer variable and function names:class Solution public List preorderTraversalTreeNode root List result new ArrayList; traverseTreeroot, result; return result; public void traverseTreeTreeNode node, List resultList ifnode null return; resultList.addnode.val; traverseTreenode.left, resultList; traverseTreenode.right, resultList; 