For distribution a, find the median starting from the bottom. For distribution b, find the median starting from the top. The median of distribution c can probably be solved by inspection.
a.
b. 4, 0, -1, 2, 1, 0, 3, 1, -2, -2, -1, 2, 1, 3, 0, -2, 1, 2, 0, 1
c. 28, 27, 26, 21, 18, 10