private static void WriteResults(IGradeTracker book)
{
GradeStatistics stats = book.ComputerStatistics();
foreach (float grade in book)
{
Console.WriteLine(grade);
}
WriteResult("Average", stats.AverageGrade);
WriteResult("Highest", stats.HighestGrade);
WriteResult("Lowest", stats.LowestGrade);
WriteResult(stats.Description, stats.LetterGrade);
}
