using System;
public class Program
{
public static void Main()
{ //Question 2
} int a = 4, b = -2, c = 11, d = -4, e = 5, f = 9, g = 7;
double average = (a + b + c + d + e + f + g) / 7.0;
Console.WriteLine(average.ToString("0.00"));
}