Hi guys
I'm Ameypawar ...
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For the difference command to work, what needs to happen?

Sorry about the calculator and me asap me asap because for real like some no one answers question one for me so that's why i'm posting them over to that way someone can at least answer number two or one for me if you do you so much if you do it would be a complete big blessing to me

Look at the map of africa below. name the three ancient discoveries labeled on the map, and the present-day country their history is a part of.