input: def print_grade_table(students):
      """Given a list of dictionaries where each dictionary contains the 'name' and 'grade' of a student, print a formatted table of grades.
      
      Example:
      >>> 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']}")