the line plot shows the shoe sizes of the sixth-grade boys on a team.Which is the interquartile range of the boys' size shown on the line plot?

In order to determine the interquartile range of the data set, first, write the list of shoe sizes:
4 1/2, 4 1/2, 5, 5 1/2 , 5 1/2, 6 1/2, 6 1/2, 6 1/2, 6 1/2, 7 1/2, 7 1/2, 8, 8, 8,
8 1/2,