Please answer quick! This is due soon!

Complete the constructor for the Triangle class. public class Triangle { private int base; private int height; private int area: // constructor // postcondition: the instance variables are initialized public Triangle(int b, int h) { } Complete the area() method of the Circle class. public class Circle { private double radius; // constructor // postcondition: the instance variable is initialized public Circle(double rad) { radius = rad; } // postcondition: returns the area of this circle according to the formula // area = PI r 2, where PI is the value of pi (3.1415...), I // is the radius of the circle, and "-2" means raised to the second power. // Operands are multiplied. // Use the constant Math.PI in your calculation to represent PI public double area() { } }