Create an interface called ChangeSpeed. Give it a method public void speedUp() and public void slowDown() Create an abstract class called Vehicle and implement the interface ChangeSpeed Create a Train, Car and Bicycle class that extend the Vehicle class, resolve any compilation problems In your main() method create an array of Vehicles. Make about 5 vehicles that are a mix of Train, Car and Bicycle. Then iterate through the array with a for loop and call the speedUp() and slowDown() methods on each Vehicle. Look at the solutions ChangeSpeed.java, Vehicle,java, Train.java, Car.java, Bicycle.java and VehicleMain.java.