using System;

public class Program

{

    public static void Main()

    {

        double testGrade = 0;

        double yearsOld = 0;

        double yearBorn = 0;

        double currentYear = 2018;

        string letterGrade = "";

        string firstName = "";

        string lastName = "";

        Console.WriteLine("First Name : ");

        firstName = Console.ReadLine();

        Console.WriteLine("Last Name : ");

        lastName = Console.ReadLine();

        Console.WriteLine("What year were you Born :");

        yearBorn = double.Parse(Console.ReadLine());

        Console.WriteLine("Test score :");

        testGrade = double.Parse(Console.ReadLine());

        if(testGrade >= 90)

        {

            letterGrade = "A";          

        }

        if(89 >= testGrade && testGrade >= 80)

        {

            letterGrade = "B";          

        }

        if(79 >= testGrade && testGrade >= 70)

        {

            letterGrade = "C";          

        }

        if(69 >= testGrade && testGrade >= 60)

        {

            letterGrade = "D";          

        }   

        if(59 >= testGrade)

        {

            letterGrade = "E";          

        }   

        yearsOld = currentYear -  yearBorn;

        Console.WriteLine(firstName + " " + lastName + " will be " +  yearsOld + " years old in 2018");

        Console.WriteLine(firstName + " " + lastName + " test score of " + testGrade + " = " + letterGrade);

​

    }

}