Answered Essay: I need to complete these exercises with a given code. Every instruction is included in the pictures

#include <iostream>
#include <iomanip>
using namespace std;
// This program will demonstrate the scope rules.
// PLACE YOUR NAME HERE

const double PI = 3.14;
const double RATE = 0.25;

void findArea(float, float&);
void findCircumference(float, float&);

int main()
{
cout << fixed << showpoint << setprecision(2);
float radius = 12;

cout <<” Main function outer block” << endl;
cout << “area, radius and PI are active here”<< endl << endl;
{
float area;
cout << “Main function first inner block” << endl;
cout << “area, radius and PI are active here”<< endl << endl;

// Fill in the code to call findArea here
findArea(radius, area);
cout << “The radius = ” << radius << endl;
cout << “The area = ” << area << endl << endl;
}
{
float radius = 10;
float circumference;

cout << “Main function second inner block” << endl;
cout << “area, radius and PI are active here”<< endl << endl;

// Fill in the code to call findCircumference here
findCircumference(radius, circumference);
cout << “The radius = ” << radius << endl;
cout << “The circumference = ” << circumference << endl << endl;

}

cout << “Main function after all the calls” << endl;
cout << “area, radius and PI are active here”<< endl << endl;

return 0;
}

// *********************************************************************
// findArea
//
// task: This function finds the area of a circle given its radius
// data in: radius of a circle
// data out: answer (which alters the corresponding actual parameter)
//
// ********************************************************************

void findArea(float rad, float& answer)
{

cout << “AREA FUNCTION” << endl << endl;
cout << “area, radius and PI are active here”<< endl << endl;

// FILL in the code, given that parameter rad contains the radius, that
// will find the areato be stored in answer
answer = PI * rad * rad;

}

// ******************************************************************************
// findCircumference
//
// task: This function finds the circumference of a circle given its radius
// data in: radius of a circle
// data out: distance (which alters the corresponding actual parameter)
//
// *****************************************************************************

void findCircumference(float length, float& distance)

{
cout << “CIRCUMFERENCE FUNCTION” << endl << endl;
cout << “area, radius and PI are active here”<< endl << endl;

// FILL in the code, given that parameter length contains the radius,
// that will find the circumference to be stored in distance
distance = 2 * PI * length;

}

Output:

$g++ -std=c++11 -o main *.cpp
$main
 Main function outer block
area, radius and PI are active here

Main function first inner block
area, radius and PI are active here

AREA FUNCTION

area, radius and PI are active here

The radius = 12.00
The area = 452.16

Main function second inner block
area, radius and PI are active here

CIRCUMFERENCE FUNCTION

area, radius and PI are active here

The radius = 10.00
The circumference = 62.80

Main function after all the calls
area, radius and PI are active here