Complete the program below by writing functions average and deviation. The program's purpose is to input a list of real numbers, compute their average, and display a table with each number and its deviation from the average. For example, if the data were 4.00, 12.00, 7.00, and 5.00 (average = 7.00), the deviation list would be -3.00, 5.00, 0.00, and -2.00.

#include 

#include 

using namespace std;



double average(                                                       );



void deviation(                                                       );



const int MAX_SIZE = 20;



int main()

{

	double mean;

	double nums[MAX_SIZE];

	double devFromMean[MAX_SIZE];

	int	numsSize;

	

	cout << "Enter the number of elements in the list => ";

	cin >> numsSize;

	cout << "Enter the elements of the list separated by a space => ";

	

	for (int i = 0; i < numsSize; ++i)

		cin >> nums[i];	



	mean = average( nums, numsSize );

	cout << "The mean is " << mean << endl;



	deviation( devFromMean, nums, numsSize, mean );



 	for (int i = 0; i < numsSize; ++i)

		cout << setw( 10 ) << nums[i] << setw( 10 ) << devFromMean[i] 

               << endl;



	return 0;

}





// Returns the average of the first n elements of list

double average(                                                       )





















// Fills each of the first n elements of devList with the deviation from 

// givenVal of the corresponding element of list.

void deviation(

// Prototypes

double average( const double [], int );

void deviation( double [], const double [], int, double );



// Function definitions

//

// Returns the average of the first n elements of list

double average( const double list[], int n )

{

   double sum = 0;



   for  (int i = 0; i < n;  ++i )

       sum += list[i];

   return (sum / n);

}



// Fills each of the first n elements of devList with the deviation from

// givenVal of the corresponding element of list.

void deviation( double devList[], const double list[], int n,

                double givenVal )

{

   for  (int i = 0;  i < n;  ++i)

      devList[i] = list[i] - givenVal;

}