using System;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        start:

        Console.WriteLine

        ("how many test grades do you want to enter");

        int grade = 

    int.Parse(Console.ReadLine());

             double[] testgrades = new double [grade];

                                   for (int i = 0; i < grade; i++)

        {

            Console.WriteLine("enter grade " + (i+1));

                                       testgrades[i] = double.Parse(Console.ReadLine());

        }

        Console.Clear();

                          Console.WriteLine("How many homework grades would you like to enter?");

        int grade2 = 

            int.Parse(Console.ReadLine());

                                                     double[] homeworkgrades = new double [grade2];

        for (int i = 0; i < grade2; i++)

                                 {

                                       Console.WriteLine("Please enter value number " + (i+1));

                                    homeworkgrades[i] = double.Parse(Console.ReadLine());

        }

        Console.Clear();

        Console.WriteLine("How many classwork grades would you like to enter?");

        int grade3

        = int.Parse(Console.ReadLine());

               double[] classworkgrades = new double [grade3];

              for (int i = 0; i < grade3; i++)

        {

            Console.WriteLine

        ("Please enter value number " + (i+1));

                  classworkgrades[i] = double.Parse(Console.ReadLine());

        }

        Console.Clear();

        Console.WriteLine("How many project grades would you like to enter?");

        int num4 = int.Parse(Console.ReadLine());

        double[] projectgrades = new double [num4];

        for (int i = 0; i < num4; i++)

        {

                              Console.WriteLine("enter grade " + (i+1));

                                      projectgrades[i] = double.Parse(Console.ReadLine());

        }

                             Console.Clear();

        Array.Sort

        (testgrades);

        Array.Sort

    (homeworkgrades);

        Array.Sort

            (classworkgrades);

        Array.Sort

                                   (projectgrades);

         Console.WriteLine

            ("The average of your test grades is " + testgrades.Average().ToString("##.##"));

        Console.WriteLine

             ("The average of your homework grades is " + homeworkgrades.Average().ToString("##.##"));

                    Console.WriteLine

                                ("The average of your classwork grades is " + classworkgrades.Average().ToString("##.##"));

              Console.WriteLine

                 ("The average of your project grades is " + projectgrades.Average().ToString("##.##"));

        double grades = average(testgrades.Average(), homeworkgrades.Average(),

                    classworkgrades.Average(), projectgrades.Average());

        Console.WriteLine("Your average is  " + grades);

        if (grades >= 65)

                   {Console.WriteLine("you are passing");}

        if (grades < 65)

        {Console.WriteLine("You are failing");}

​

    }

    static private double average

                    (double testgrades, double homeworkgrades, double classworkgrades, double projectgrades)

    {

​

        double test = testgrades * .5;

        double homework =

    homeworkgrades * .15;

        double classwork

        = classworkgrades * .15;

                                                double project = projectgrades * .2;

        double avg1 = test + homework + classwork + project;

        return avg1;

    }

                            static private double Median(double[] array) 

    {

          double [] tempArray = array;

        int count = tempArray.Length;

        Array.Sort(tempArray);

        double medianValue = 0;

         if (count % 2 == 0)

        {

            double middleElement1 = tempArray[(count / 2) - 1];

             double middleElement2 = tempArray[(count / 2)];

                                      medianValue = (middleElement1 + middleElement2) / 2;

        }

        else

        {

            medianValue = tempArray[(count / 2)];

        }

                    return medianValue;

    }

               }