Please help me with this in C++: Add another two functions to DISPLAY 4.12 to ca

Question

Please help me with this in C++:

Add another two functions to DISPLAY 4.12 to calculate:

The volume of the smallest cube around the sphere

The area of the smallest cube around the sphere

The volume of the biggest cube that can fit inside the sphere

//DISPLAY 4.12 A Global Named Constant
//Computes the area of a circle and the volume of a sphere.
//Uses the same radius for both calculations.
#include <iostream>
#include <cmath>
using namespace std;

const double PI = 3.14159;

double area(double radius);
//Returns the area of a circle with the specified radius.

double volume(double radius);
//Returns the volume of a sphere with the specified radius.

int main( )
{
    double radius_of_both, area_of_circle, volume_of_sphere;

    cout << "Enter a radius to use for both a circle "
            << "and a sphere (in inches): ";
    cin >> radius_of_both;

    area_of_circle = area(radius_of_both);
    volume_of_sphere = volume(radius_of_both);

    cout << "Radius = " << radius_of_both << " inches "
            << "Area of circle = " << area_of_circle
            << " square inches "
            << "Volume of sphere = " << volume_of_sphere
            << " cubic inches ";

    return 0;
}

double area(double radius)
{
    return (PI * pow(radius, 2));
}

double volume(double radius)
{
    return ((4.0/3.0) * PI * pow(radius, 3));
}

Explanation / Answer

so we will use these 2 values in our program:

int main( )
{
    double radius_of_both, area_of_circle, volume_of_sphere;

    cout << "Enter a radius to use for both a circle "
            << "and a sphere (in inches): ";
    cin >> radius_of_both;

    area_of_circle = area(radius_of_both);
    volume_of_sphere = volume(radius_of_both);

   volume _of _smallest _cube=volume_Smallest_cube(radius_both;

    volume_of_largest_cube=volume_largest_cube(radius_both);

    cout << "Radius = " << radius_of_both << " inches "
            << "Area of circle = " << area_of_circle
            << " square inches "
            << "Volume of sphere = " << volume_of_sphere
            << " cubic inches ";

cout<< volume_of_smallest_cube;

cout<<volume of largest cube;

    return 0;
}

double area(double radius)
{
    return (PI * pow(radius, 2));
}

double volume(double radius)
{
    return ((4.0/3.0) * PI * pow(radius, 3));
}

double volume_smallest_cube( double radius)

{ return( 8 * pow(radius,3));

}

double volume_largest_cube(double radius)

{ return ( 4.19 * pow (radius,3));

}

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