input: def print_grade_table(students):
      """
      Given a list of students with 'name' and 'grade', this function prints a formatted table of grades.
  
      >>> print_grade_table([
      ...     {'name': "John", 'grade': 92},
      ...     {'name': "Alice", 'grade': 95},
      ...     {'name': "Bob", 'grade': 87}
      ... ])
      Name   Grade
      ------------
      John   92
      Alice  95
      Bob    87
      """
output:     print("Name   Grade")
      print("------------")
      for student in students:
          print(f"{student['name']:<6} {student['grade']}")