In a box and whisker plot, the green rectangle typically represents the interquartile range (IQR), which spans from the lower quartile (Q1) to the upper quartile (Q3). The dots at the ends of the rectangle (5 and 9.5 in this case) represent the lower and upper quartiles, respectively.
Based on your description, the correct response about the data points represented by the dots at 5 and 9.5 is:
medians of lower and upper quartiles