What is the average rank for the film directed by michael bay?
CREATE TABLE table_48108 (
    "Rank" real,
    "Title" text,
    "Studio" text,
    "Director" text,
    "Worldwide Gross" text
)
SELECT AVG("Rank") FROM table_48108 WHERE "Director" = 'michael bay'
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 average rank for the film directed by michael bay? ### Input: CREATE TABLE table_48108 (
    "Rank" real,
    "Title" text,
    "Studio" text,
    "Director" text,
    "Worldwide Gross" text
) ### Response: SELECT AVG("Rank") FROM table_48108 WHERE "Director" = 'michael bay'