How To fix FacebookSDK merge error in androidmanifest.xml ?

Hey guys! How are you doing ? I´m almost finis$$anonymous$$ng my first app. And it´s basically a trivia game. But i need Facebook SDK to do a rank with the users friends. But when i started building it for android i receive t$$anonymous$$s error:

I´m one week trying to solve t$$anonymous$$s, and i´ve read all posts that talsk about it, but i did not understand how can i solve t$$anonymous$$s. Can someome guive me a $$anonymous$$nt of what to do ? Thanks!