20. If a class named School has no constructors defined explicitly, the following constructor is implicitly provided. * (2 points) private School School static School protected School) public School 21. What is the output of the following program segments? int y int x=4; switch (x++){ case 2: y=100; case 4:y=200; case 5:y+=300; default: y-=50; } System.out.println(y-x); Dista