Section C: Modular Programming [20 marks] The program below display the following menu: Geometry Calculator 1. Calculate the Area of a Circle 2. Calculate the Area of a Rectangle 3. Calculate the Area of a Triangle 4. Quit Enter your choice (1-4): If the user enters 1, the program should ask for the radius of the circle and then display its area. Use 3.14159 for n. If the user enters 2, the program should ask for the length and width of the rectangle, and then display the rectangle's area. If the user enters 3, the pro- gram should ask for the length of the triangle's base and its height, and then display its area. If the user enters 4, the program should end. Input Validation: Display an error message if the user enters a number outside the range of 1 through 4 when selecting an item from the menu. Do not accept negative values for the circle's radius, the rectangle's length or width, or the triangle's base or height. You are therefore, required to complete the program by putting in codes under each comment. include using namespace std; //variable declaration as global //Functions Prototype COSC121 (2ND @2020/2021] SANDWICH II Page 4 int main(int argc, char** argv) { Il function call return 0; } //function definition for choice input Il function definition for area of circle Il function definition for area of rectangle I/function definition for area of triangle