using System;

public class Program

{

    public static void Main()

    {

        int[] studentgrades = new int[] {15,13,8,12,6,16};

        double averageResult = GetAverage(studentgrades);

        foreach(int grade in studentgrades)

        {

            Console.WriteLine(" {0}",grade);

        }

        Console.WriteLine("The average is: {0}", averageResult);

    }

    static double GetAverage(int[] gradesArray)

    {

        int size = gradesArray.Length;

        double average;

        int sum = 0;

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

        {

            sum += gradesArray[i];

        }

        average = (double)sum / size;

        return average;     

    }

}