using System;

public class Program

{

    public static int[,] CreateIncreasingMatrix(int m, int n, int k)

    {

        int num = 1;

        int[,] result = new int[m,n];

        for(int i=0;i<m;i++){

            for(int j=0;j<n;j++){

                result[i,j] = num;

                num+=k;

            }

        }

        return result;

    }

    public static void PrintArray(int[,] matrix)

    {

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

        {

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

            {

                Console.Write(matrix[i,j].ToString()+"\t");

            }

            Console.Write("\n");

        }

    }

    public static double[] FindNumberByPosition(int[,] matrix)

    {

        double[] result = new double[matrix.GetLength(1)];

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

        {

            double avr = 0;

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

            {

                avr += matrix[i,j];

            }

            result[j]=avr/matrix.GetLength(0);

        }

        return result;

    }

    public static void PrintListAvr(double[] list){

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

            Console.Write(list[i].ToString("#.00")+"\t");

        }

    }

​

    public static void Main()

    {

        PrintArray(CreateIncreasingMatrix(3,4,2));

    }

}