On July 7, 1865, four of the conspirators were executed. What were their roles in the plot?

Those four individuals were Mary Surratt, Lewis Powell, George Atzerodt and David Herold, who were executed for participation in the plot.

Surratt was the owner of the boarding house where the plot was being created, Powell tried to kill Secretary of State, Atzerodt was planning to kill vice-president, while Herold's task was to help Powell kill the president and to help Booth escape.

Explanation:

All of the individuals were sentenced to death by hanging.

History remarked that Surratt was the first women to be executed by US government in its history, while the case against her was weakest, as although her son participated in the plot, there were no direct directs that she was involved.

b toward the volcano.landward. the landward side of something is the side nearest to the land or facing the land, rather than the sea.

they supported black codes so the answer is a or b