/* Missing statements ? */ 

pub

/* Missing statements ? */ 
 public class NewTreeSet extends java.util.TreeSet {   
   public static void main(String [] args) {   
     java.util.TreeSet t = new java.util.TreeSet();        
     t.clear();   
   }    
   public void clear() {     
     TreeMap m = new TreeMap();   
     m.clear();   
   } 
 } 

which two statements, added independently at beginning of the program, allow the code to compile?

1. No statement is required

2. import java.util.*;

    

3. import.java.util.Tree*;

    

4. import java.util.TreeSet;

    

5. import java.util.TreeMap;

    

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