public static void RenderStatistics(IBook book) { try { var statistics = book.ComputeStatistics(); Console.WriteLine($"Grade Book: {book.Name}"); Console.WriteLine($"The average grade is {statistics.Average:N2}"); Console.WriteLine($"The highest grade is {statistics.HighestGrade:N2}"); Console.WriteLine($"The lowest grade is {statistics.LowestGrade:N2}"); Console.WriteLine($"The letter grade is {statistics.Letter}"); } catch (Exception exception) { Console.WriteLine(exception.Message); } }