CREATE TABLE table_54036 ("Year" FLOAT, "Single" CLOB, "Chart" CLOB, "Position" FLOAT, "Weeks on chart" FLOAT)

What is the average weeks of a song with a larger than 3 position after 1977?
SELECT AVG("Weeks on chart") FROM table_54036 WHERE "Position" > '3' AND "Year" > '1977'
SELECT AVG("Weeks on chart") FROM "table_54036" WHERE "Position" > '3' AND "Year" > '1977'