static void Main() { Teacher teacher = new Teacher("Georgi", "Georgiev", 10, "Mathematics"); teacher.CheckHomework(); Console.WriteLine(teacher.Greeting()); teacher.Goodbay(); Lecturer lecturer = new Lecturer("Atanas", "Atanasov", 12, "Sofia University"); lecturer.CheckHomework(); string str = "wordInSpanish"; string someString = ""; string someOtherString = ""; lecturer.DoSomeExercise(); lecturer.DoSomeExercise(str); lecturer.DoSomeExercise(someString, someOtherString); lecturer.Greeting(); Console.WriteLine(Lecturer.MaximumLecturesOfWeek); Professor professor = new Professor("Erik", "Svenson", 15, "Stockholm University", "Associate professor"); professor.JobInfo(); professor.CheckHomework(); professor.ConductAnExam(); Assistant assistant = new Assistant("Paolo", "Contrera", 7, "University of Lisbon", true); assistant.Info(); assistant.CheckHomework(); assistant.CheckExams(); assistant.CreateArticles(); SchoolTeacher schoolTeacher = new SchoolTeacher("Vasil", "Vasilev", 14, "Biology"); schoolTeacher.PrintClasses(); schoolTeacher.CheckHomework(); schoolTeacher.Entertain(); CollegeTeacher collegeTeacher = new CollegeTeacher("Ivan", "Ivanov", 11, "Marketing", "MT&M Sofia"); collegeTeacher.CheckHomework(); Console.WriteLine(Person.personCount); }