CREATE TABLE table_53262 ("Rank" FLOAT, "Previous Rank" TEXT, "Name" TEXT, "Nationality" TEXT, "Team" TEXT, "Points" FLOAT)

Tell me the sum of rank for australia when points are less than 79
SELECT SUM("Rank") FROM table_53262 WHERE "Nationality" = 'australia' AND "Points" < '79'
SELECT SUM("Rank") FROM "table_53262" WHERE "Nationality" = 'australia' AND "Points" < '79'