SELECT Nationality, AVG(Age) FROM journalist GROUP BY Nationality ORDER BY AVG(Age) DESC
Draw a bar chart of nationality versus the average of age, I want to order total number from high to low order.
CREATE TABLE journalist (
    journalist_ID int,
    Name text,
    Nationality text,
    Age text,
    Years_working int
)

CREATE TABLE news_report (
    journalist_ID int,
    Event_ID int,
    Work_Type text
)

CREATE TABLE event (
    Event_ID int,
    Date text,
    Venue text,
    Name text,
    Event_Attendance int
)