SELECT name, AVG(T1.stars) FROM Rating AS T1 JOIN Reviewer AS T2 ON T1.rID = T2.rID GROUP BY T2.name ORDER BY name DESC
What is the average rating star for each reviewer, and rank by the bar in descending please.
CREATE TABLE Movie (
    mID int,
    title text,
    year int,
    director text
)

CREATE TABLE Reviewer (
    rID int,
    name text
)

CREATE TABLE Rating (
    rID int,
    mID int,
    stars int,
    ratingDate date
)