1- Design a class named Triangle that extends GeometricObject. The class contains:

• Three double data fields named side1, side2, and side3 with default values 0 to denote three sides of the triangle (6 points).
• A no-arg constructor that creates a default triangle. (6 points)
• A constructor that creates a triangle with the specified side1, side2, side3, and the String color, and boolean filled. Make sure you use the super() method. (16 points)
• The accessor methods for all five data fields used for the non-def constructor. (10 points)
• A method named getArea() that returns the area of this triangle. (8 points)
• A method named getPerimeter() that returns the perimeter of this triangle. (8 points)
• A method named toString() that returns a string description for the triangle. (6 points)

For the formula to compute the area of a triangle, see Exercise 5.19. The toString() method is implemented as follows:

return "Triangle: side1 = " + side1 + " side2 = " + side2 + " side3 = " + side3;

Implement the class:

2- Write a test program TestTriangle.java that creates a Triangle object:

• with sides 1, 1.5, 1
• color = yellow
• filled = true (10 points)
• displays its area (2.5 points)
• displays its perimeter(2.5 points)
• displays its color (2.5 points)
• displays whether it is filled or not (2.5 points)