I the class Manager extends the class Employee, which class is the superclass and which is the subclass? 8. If a is a variable of type BankAccount that holds a non-null reference, what do you know about the object to which a refers? 9areferest hansfer (100 ai? 10. What does this code fragment print? Why is this example of polymorphism? Also, explain your answer. DataSet data new DataSet); Data.add(new BankAccount(1000)): Data.add(new Coin(0.1, "dime"); System.out.println(data.getAverage()