static void Main(string[] args) { var gradebook = new Book("The great book"); gradebook.AddGrade(95.2); gradebook.AddGrade(91.2); gradebook.AddGrade(77.2); gradebook.ShowStatictics(); var stats = gradebook.GetStatistics(); Console.WriteLine($"The lowest grade is {stats.LowGrade}"); Console.WriteLine($"The highest grade is {stats.HighGrade}"); Console.WriteLine($"The average grade is {stats.Average:N1}"); }