If 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? refers t coc . 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())