CREATE TABLE table_name_29 (highest_average_point_ratings INT, genre VARCHAR, number_of_episodes VARCHAR)

What was the highest average point rating for a modern suspense show with 21 episodes?
SELECT SUM(highest_average_point_ratings) FROM table_name_29 WHERE genre = "modern suspense" AND number_of_episodes = 21
SELECT SUM("highest_average_point_ratings") FROM "table_name_29" WHERE "genre" = "modern suspense" AND "number_of_episodes" = 21