IN JAVA ANSWER 1.4 in YELLOW:

class XYPoint{ double x; //this is like creating a struct but in java double y; public double distance (){ return Math.sqrt(x*x +y*y); } }

public class Main{ public static void main(String[] argv){ //make a new instandce of an XY point XYPoint p=new XYPoint();

//assign values to its varaiables p.x =2; p.y=3;

double d= p.distance(); System.out.println("Distance =" +d); } }