student$\_$scores $=\{$ 'Harry': $88,$ 'Ron': $78,$ 'Hermione': $95,$ 'Draco': $75,$ 'Neville': $60\}$ student$\_$grades $=\{\}$ for student in student$\_$scores: score $=$ student$\_$scores$[$student$]$ if score $>=91$: student$\_$grades$[$student$]=$ 'Outstanding' elif score $>=81$: student$\_$grades$[$student$]=$ 'Exceeds Expectations' elif score $>=71$: student$\_$grades$[$student$]=$ 'Acceptable' else: student$\_$grades$[$student$]=$ 'Fail' explain