On a coordinate grid, point t is at (2, −4) and point s is at (2, 6). the distance (in units) between points t and s is (input only whole numbers, such as 2.)

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.