Please explain understandably. (15)

system.out.printin(numbers): at is a wrapper class? Describe the difference between an int and an Integer. Write the output produced when the following method is passed each of the following lists public sta 15. atic void mysteryl (ArrayList list) for (int i list.size() 1 i 0i)( if (list.get (i)list.get( 1 int element list.get(i) list.remove (i) list.add(o, element) System.out.println(list): a. 12, 6, 1, 81 b30, 20, io, 60, 50, 401 c.-4, 16, 9, 1, 64, 25, 36, 4, 49] rite the output produced when the following method is passed each of the following lists: public static void mystery2 (ArrayList List) for (int = list.size() - 1; >-; i--) { if(i % 2-0) { 1 st.get ( ) )