input: def print_grade_table(students):
      """Prints a formatted table of grades for a given set of students.
      >>> 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']:<12}{student['grade']}")