CREATE TABLE table_13506 ("Rank" FLOAT, "Heat" FLOAT, "Lane" FLOAT, "Name" TEXT, "Nationality" TEXT, "Time" FLOAT)

What is the Heat of the 34 Rank swimmer with a Time of 49.49 or less?
SELECT AVG("Heat") FROM table_13506 WHERE "Rank" = '34' AND "Time" < '49.49'
SELECT AVG("Heat") FROM "table_13506" WHERE "Rank" = '34' AND "Time" < '49.49'