1. Complete following two methods in BinTree.java:
   *  private BinTree(BinTree left, BinTree right)
   *  public int getMax()   
   By reading the comment in BinTree.java you will know the requirement.

2. The TestBinTree.java file and the expected test results in expected_result.txt
   is another way for you to know the requirement, and you can use them to test
   your code.

3. Submit you code to your svn repository folder, and inside subfolder lab14mar/

4. This lab itself does not count to the final mark of the course.wo BinTree