The box plot shows the times for sprinters on a track team.

A horizontal number line starting at 40 with tick marks every one unit up to 59. The values of 44, 48, 50.5, 53, and 56 are all marked by the box plot. The graph is titled Sprinters' Run Times, and the line is labeled Time in Seconds.

Which value does 50% of the data lie above, and what is it called?

48, the lower quartile
50.5, the median
56, the median
53, the upper quartile