using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp10
{
    class Program
    {
        static void Main(string[] args)
        {
            string name = Console.ReadLine();
            double grades = 1;
            double sum = 0;
            
            while (grades <= 12)
            {
                double grade = double.Parse(Console.ReadLine());

                if (grade >= 4.00)
                {
                    sum = sum + grade;
                    grades++;
                }   

            }
            double average = sum / 12;
            Console.WriteLine($"{name} graduated. Average grade: {average:F2}'');
            

        }
    }
}

Това е задача номер 3 от лаба на While-Цикъл C# .До тук ми дава само 44/100 точки.