using System;

​

public class Program

{

    public static double[] arrayAvg(double[, ] a)

    {

        double[] tempArray = new double[a.GetLength(0)];

        double sum = 0;

        for (int i = 0; i < a.GetLength(0); i++)

        {

            for (int j = 0; j < a.GetLength(1); j++)

            {

                sum = sum + a[i, j];

            }

​

            double avg = sum / (a.GetLength(1));

            tempArray[i] = avg;

            sum = 0;

        }

​

        return tempArray;

    }

​

    public static void Main()

    {

        Console.WriteLine("Enter the number of students that are in your class?");

        int students = int.Parse(Console.ReadLine());

        string[] names = new string[students];

        Console.WriteLine("Enter the names of each student.");

        for (int i = 0; i < names.Length; i++)

        {

            names[i] = Console.ReadLine();

        }

​

        Array.Sort(names);

        Console.WriteLine("How many grades does each student have?");

        int ngrades = int.Parse(Console.ReadLine());

        double[, ] grades = new double[students, ngrades];

        for (int i = 0; i < grades.GetLength(0); i++)

        {

            Console.WriteLine("Please enter the grades for " + names[i]);

        for (int j = 0; j < grades.GetLength(1); j++)

        grades[i,j] = double.Parse(Console.ReadLine());     

        }

        double[] classAvg = arrayAvg(grades);

​

    }

}