CREATE TABLE table_65789 ("Rank" FLOAT, "Summit" TEXT, "Country" TEXT, "Island" TEXT, "Col  ( m ) " FLOAT)

What's the lowest Col ranked less than 6 with an Island of Moloka i?
SELECT MIN("Col (m)") FROM table_65789 WHERE "Island" = 'island of molokaʻi' AND "Rank" < '6'
SELECT MIN("Col (m)") FROM "table_65789" WHERE "Island" = 'island of molokaʻi' AND "Rank" < '6'