using System;

​

public class Program

{

    public static void Main()

    {string[] names = {"Albert", "Bert", "Al", "Allie"};

        int[, ] grades = {{1, 80, 90, 100, 80}, {2, 70, 65, 90, 100}, {3, 50, 49, 80, 62}, {4,49, 50, 63, 99}};

        int sum = 0;

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

        {

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

            {

                sum = sum + grades[i, j];

            }

​

            int avg = sum / (grades.GetLength(1) - 1);

            Console.WriteLine(names[i] +"  has an average of " + avg);

            if (avg < 65)

                Console.WriteLine("They failed for the quarter.");

            sum = 0;

            int[, ] arr = new int[4, 5];

        int a = 0;

        foreach (int i in arr)

        {

            Console.Write(i + " ");

        }

​

        Console.WriteLine("\n");

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

        {

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

            {

                a += 5;

                arr[i, j] = a;

            }

        }

​

​

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

        {

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

            {

                Console.Write(arr[i, j] + " ");

            }

        }

        }

    }

}