CREATE TABLE table_name_62 (runner_up INT, university VARCHAR, total_championships VARCHAR)

What is the average number of runner-up that National University, which has more than 2 total championships, has?
SELECT AVG(runner_up) FROM table_name_62 WHERE university = "national university" AND total_championships > 2
SELECT AVG("runner_up") FROM "table_name_62" WHERE "national university" = "university" AND "total_championships" > 2