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Exercise 15: A determination of the paths for some messages for a 3D and 4D hypercube.

Label the nodes in the 3d and 4d hypercubes in Figure 11. In the 4D cube, draw the paths that are taken by the following messages: from 0 to 15; from 3 to 12; from 5 to 10, and from 10 to 5.