JAVA PLEASE EXPLAIN

15. What is the output?

public class Ground1 { public Ground1() { System.out.println("You are driving the car); } public Ground1(String groundColor) { System.out.println("The car color is "+ groundColor); } } public class Sky1 extends Ground1 { public Sky1() { System.out.println("You are in the plane!"); } public Sky1(String skyColor) { super("green"); System.out.println("The plane is "+ skyColor); } } public class Checkpoint1 { public static void main(String[] args) { Sky1 object= new Sky1("blue");

Sky1 object=new Sky1(); } }