3. Are the following assignments legal or not? Why? Object obj- new Integer(42); Integer iObj-43; iObi- obj: 4. Consider the IntLinkedBag How to implement the method countOccurrences, add, remove? 5. Consider the generic ArravBag (a) how to implement the method countOccurrences, add, remove? (b) How to make the ArrayBag comparable? (c) Integer i- new Integer(42); Integerj-new Integer(43): ArrayBag b- new ArrayBag*Integer> ): // Add two i's and onej b.add(j) Draw a diagram showing the reference variables i and j with their pointers to Integer objects, and also show b's data array with its pointers after these add statements What is the printout of the following statement? System.out.println(b.countOccurences(i)