input: Write a python function to create a list of Student objects and return their names.
  assert get_student_names([Student("Alice", 14, "8th", "A"), Student("Bob", 15, "9th", "B"), Student("Charlie", 13, "7th", "A")]) == ["Alice", "Bob", "Charlie"]
  assert get_student_names([Student("David", 16, "10th", "C")]) == ["David"]
  assert get_student_names([]) == []
output: def get_student_names(students):
      return [student.name for student in students]