plz do 7 8 and 9

6 in 8n object or ented trank umulation wstem, wo have the ?0eerwing classes . Vehicle e Car Truck Sedan . Coupe . PickupTruck SportutilityVehicle Minivan Bicycle e Motorcycle Draw an inheritance diagram that shows the relationships between these classes Nehi do icke tech 7. If the class Manager extends the class Employee, which class is the superclass and which is the subclas If a is a variable of type BankAccount that holds a non-null reference, what do you know about the o which a refers? 8. If a referes to a checking account, what is the effect of calling a.transfer (1000, a)? 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.printin(data.getAverage()