Which two consecutive whole numbers does ?39 lie between? Why?5 and 6 because 39 falls between 5 =25 and 6 = 36.4 and 6 because

Which two consecutive whole numbers does ?39 lie between? Why?5 and 6 because 39 falls between 5² =25 and 6² = 36.4 and 6 because 39 falls between 4² = 16 and 6² = 36.6 and 7 because 39 falls between 6² = 36 and 7² = 49.5 and 7 because 39 falls between 5² = 25 and 7² = 49.