using System;

public class Program

{

    public static void Main()

    {

        double sum=0, avg=0;

            double[] numbers = { 20, 20, 50, 40};

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

            {

                sum += numbers[i];

            }

            avg = sum / numbers.Length;

            Console.WriteLine("The Sum is : "+sum);

            Console.WriteLine("The Average is : "+avg);

​

    }

}