Can someone please tell me the answer to each question pls

According to this contract, when will the sharecropper receive his payment?

Why did einstein write a letter to president roosevelt

23. how does specialization among nations encourage interdependence? nations work together to share labor and resources to produce vital goods. nations sign treaties prohibiting taxes on imports. nations produce specific goods and then trade to obtain things they need. nations that are more developed agree to fund development in nations with limited industry.