public class Circle
{
   private double radius;
   private String colour;

// Question 1

public Circle()
{
   radius = 1.0;
   colour = "black";
}
public Circle(double inputRadius)
{
   radius = inputRadius;
   colour = "black";
}
public Circle(String inputColour)
{
   colour = inputColour;
   radius = 1.0;
}
public Circle(double inputRadius, String inputColour)
{
   radius = inputRadius;
   colour = inputColour;
}
// Question 2
public double getRadius()
{
   return radius;
}
public String getColour()
{
   return colour;
}
//Question 3
public double getArea()
{
   double area = Math.PI*this.radius*this.radius;
   return area;
}
// Question 4: We can be sure of what value r will take as it is specified as a //parameter in the constructor. Setters:
public void changeRadius(double radius)
{
   this.radius = radius;
}
public void changeColour(String colour)
{
   this.colour = colour;
}
// Question 5
public static double exerciseMethod (Circle c1, Circle c2, Circle c3)
{
if (c1.getRadius() == c2.getRadius() && c1.getRadius() == c3.getRadius())
   System.out.print("All circles are the same size with colours " + c1.getColour() ", " + c2.getColour() + " and " + c3.getColour());
else if (c1.getRadius() == c2.getRadius())
   System.out.println("Circles 1 and 2 have the same size, with colours " + c1.getColour() + " and " + c2.getColour());
else if (c1.getRadius() == c3.getRadius())
   System.out.println("Circles 1 and 3 have the same size, with colours " + c1.getColour() + " and " + c3.getColour());
else if (c2.getRadius() == c3.getRadius())
   System.out.println("Circles 2 and 3 have the same size, with colours " + c2.getColour() + " and " + c3.getColour());
else if (c1.getRadius() > c2.getRadius() && c1.getRadius() > c3.getRadius() )
   System.out.println(c1.getColour());
else if (c2.getRadius() > c1.getRadius() && c2.getRadius() > c3.getRadius())
   System.out.println(c2.getColour());
else if (c3.getRadius() > c1.getRadius() && c3.getRadius() > c2.getRadius())
   System.out.println(c3.getRadius());

double areaSum = c1.getArea() + c2.getArea() + c3.getArea();
return areaSum;
}

}