Decompose the graph K9 into _-factors. Hint: There is no cyclic decomposition as in Figure 7.2. Decompose the graph K6n−2 into 3-factors. Hint: Use Theorem 7.2.9. Readers interested in seeing more results on 1-factorizations and graph decompositions in general should consult the monographs [Bos90] and [Wal97].