Suppose that you do a depth-first search of the graph. Whenever there is an arbitrary choice of what vertex or edge to consider next, you always choose the choice that comes first in alphabetical order. The first pre-number assigned is 1. Please note: The temptation to start with vertex 5 may be overwhelming, but it will lead you astray. Refer back to the highlighted text above! Question 6 2 pts What is the post number for vertex F? (Enter a single positive integer and nothing else. This is being graded by a program!) Question 7 2 pts What is the pre number for vertex G? (Enter a single positive integer and nothing else. This is being graded by a program!) Question 8 2 pts What is the post number for vertex H? (Enter a single positive integer and nothing else. This is being graded by a program!) Question 9 2 pts What is the pre number for vertex I? (Enter a single positive integer and nothing else. This is being graded by a program! Question 10 2 pts What is the post number for vertex S? (Enter a single positive integer and nothing else. This is being graded by a program