<image> Think and fill in the blanks. ____
(1) The number of white rabbits is 5 times that of black rabbits. The ratio of the number of white rabbits to black rabbits is (____). ____
(2) The number of pine trees is the same as that of cypress trees. The ratio of the number of pine trees to cypress trees is (____). ____
(3) The ratio of the number of boys to girls in the sixth grade is 2:3. The number of boys accounts for (___ )% of the total number of students in the sixth grade. ____
(4) The mass of apples is 20% more than that of pears. The ratio of the mass of apples to pears is (____).