What is the output of the following program? (You may wish to draw a structure diagram first.)

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public class Confusing { public static void method2 () { method1 (); System.out.println ("I am method 2."); public static void method3 () { method2 () ; System.out.println ("I am method 3."); method1 () ; } public static void method1 () { System.out.println ("I am method 1."); } public static void main (String[] args) { methodl () ; method3 (); method2 (); method3 ();