Answer:
2nd Box
4th Box
Explanation:
The factors of a graph is whenever the graph touches the x-axis.
A standard factor has the format (x-a), where a is the x-value.
From the graph, we can see that the graph touches the x-axis at x=3 and at x=4.
Therefore, this means that our factors are:

Simplify:

Check the second and fourth boxes.
And we're done!