Accurate decisions in an uncertain world: collective cognition increases true positives while decreasing false positives.

Me with this psychology homework, i’m struggling with it.

Which of the following items would serve as a primary source for a historian studiying the american civil war

2. explain the two different types of egyptian calendars. 3. what architectural advances did the ancient egyptians make? what impact do these advances have on our lives today? 4. what did egyptian art usually depict? how does this compare to forms of art that we see today? 5. what all was found in king tut’s tomb?