WRITE A FUNCTION THAT ADDS A PARENT NODE AND ITS 2 CHILD NODES TO A BINARY TREE. CALL THE FUNCTION IN A PROGRAM.YOUR FUNCTION SHOULD LINK THE NODES AND PUT A NUMBER IN EACH NODE.(root 10, left 20 , right 30). Write a function that outputs each number using PRE-ORDER traversal. IN YOU PROGRAM , CALL THE FUNCTION.

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