Based on the given box-and-whisker plot, you have
The last values is 8 (it is the left of the left-whisker)
The greatest values is 16 (it is the right of the right-whisker)
The first quartile is 10 (the left border of the box)
The median is 12 (it is the second quartile, second point into the box)
The third quartile is 13 (the right border of the right-whisker)