static void Main(string[] args) { // List<double> grades = new List<double>(); var book = new Book("Paul's Grade Book"); book.AddGrade(89.1); book.AddGrade(90.1); book.AddGrade(900.1); Book.Generation(); var stats = book.GetStatistics(); Console.WriteLine($"The lowest grade is {stats.Low}"); Console.WriteLine($"The highest grade is { stats.High }"); Console.WriteLine($"The average grade is {stats.Average:N1}"); }