CREATE TABLE table_name_85 (year_made NUMBER, iwcr_no VARCHAR2, year_withdrawn VARCHAR2)

What is the mean Year when the IWCR number was 5 and the Year withdrawn was bigger than 1926?
SELECT AVG(year_made) FROM table_name_85 WHERE iwcr_no = "5" AND year_withdrawn > 1926
SELECT AVG("year_made") FROM "table_name_85" WHERE "5" = "iwcr_no" AND "year_withdrawn" > 1926