The box plot displays the number of flowers planted in a town last summer. A box plot uses a number line from 3 to 31 with tick marks every one-half unit. The box extends from 10 to 18 on the number line. A line in the box is at 12. The lines outside the box end at 4 and 30. The graph is titled Flowers Planted In Town, and the line is labeled Number of Flowers. Which of the following is the best measure of center for the data shown, and what is that value