What is the highest number of 5w when there was a 21.33 average?
CREATE TABLE table_20402 (
    "Player" text,
    "Matches" real,
    "Overs" text,
    "Maidens" real,
    "Runs" real,
    "Wickets" real,
    "Average" text,
    "Economy" text,
    "5w" real,
    "10w" real,
    "Best Bowling" text
)
SELECT MAX("5w") FROM table_20402 WHERE "Average" = '21.33'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the highest number of 5w when there was a 21.33 average? ### Input: CREATE TABLE table_20402 (
    "Player" text,
    "Matches" real,
    "Overs" text,
    "Maidens" real,
    "Runs" real,
    "Wickets" real,
    "Average" text,
    "Economy" text,
    "5w" real,
    "10w" real,
    "Best Bowling" text
) ### Response: SELECT MAX("5w") FROM table_20402 WHERE "Average" = '21.33'