The mean free distance can be approximated by the average distance between obstructions in a med- ium through which a particle travels. We represent a neutron by the black dot in the figures below. medium # 1 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 medium # 2 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 The red dots represent obstructions the neutron encounters as it travel along a straight line to the left in two different media. Each vertical line in the image is separated from the next by a distance Lo. What are the mean free distances for this neutron in medium #1, and medium #2