C A-6 E D G F Consider the following graph. Below the graph are 8 possible node orderings. Which of these node orderings form a topological sort of the graph? Select all that apply. (Note: There may be other possible topological sort orderings that are not listed here.) 1) AGBDCEF 2) GDEABCF ) 3) ABGDCEF ) 4) GABCDEF 5) ABCGDEF 6) GABDCEF 7) ABDGCEF 7 8) AGBCDEF