Provide the directors and MPAA ratings of the musical movies released in 1993.
Musical movies refer to genre = 'Musical'; released in 1993 refers to substr(release_date, length(release_date) - 3, length(release_date)) = '1993';
SELECT T2.director, T1.MPAA_rating FROM movies_total_gross AS T1 INNER JOIN director AS T2 ON T1.movie_title = T2.name WHERE T1.genre = 'Musical' AND SUBSTR(T1.release_date, LENGTH(T1.release_date) - 3, LENGTH(T1.release_date)) = '1993'