Plot the average of age by grouped by class as a bar graph
CREATE TABLE Ship (
    Ship_ID int,
    Name text,
    Type text,
    Built_Year real,
    Class text,
    Flag text
)

CREATE TABLE captain (
    Captain_ID int,
    Name text,
    Ship_ID int,
    age text,
    Class text,
    Rank text
)
SELECT Class, AVG(age) FROM captain GROUP BY Class
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: Plot the average of age by grouped by class as a bar graph ### Input: CREATE TABLE Ship (
    Ship_ID int,
    Name text,
    Type text,
    Built_Year real,
    Class text,
    Flag text
)

CREATE TABLE captain (
    Captain_ID int,
    Name text,
    Ship_ID int,
    age text,
    Class text,
    Rank text
) ### Response: SELECT Class, AVG(age) FROM captain GROUP BY Class