static void Main(string[] args) { Student Marshall = new Student(); Marshall.Name = "Marshall"; InternationalStudent Xiong = new InternationalStudent(); Xiong.Name = "Xiong"; Console.WriteLine(Marshall.Name); Console.WriteLine(Xiong.Name); double tuition = Marshall.GetTuition(3); Console.WriteLine(tuition); tuition = Xiong.GetInternationalTuition(3); Console.WriteLine(tuition); }