What does the following query return?CREATE TABLE s(n TEXT, m INT); INSERT INTO s VALUES ('a',90),('b',90),('c',80),('d',70); SELECT n, RAN…

What does the following query return?

CREATE TABLE s(n TEXT, m INT);
INSERT INTO s VALUES ('a',90),('b',90),('c',80),('d',70);
SELECT n, RANK() OVER (ORDER BY m DESC) AS r,
       DENSE_RANK() OVER (ORDER BY m DESC) AS d FROM s WHERE n = 'c';