QUESTION 30 Given that the current directory is empty, and that the user has read and write permissions, and the following:11. import java.io.*;12. public class DOS {13. public static void main(String[] args) {14. File dir = new File("dir");15. dir.mkdir();16. File f1 = new File(dir, "f1.txt");17. try {18. f1.createNewFile();19. } catch (IOException e) { ; }20. File newDir = n..