FRANKFURT, Germany (AP) — The tentative agreement to end the war in Iran and reopen the Strait of Hormuz would be good news for the global economy. But even as the price of oil dropped Monday, many questions remained about when and how it would start flowing again through the world’s most vital artery for energy shipments. Before the war, the strait carried a fifth of the world’s crude oil. Now, it will take time for hundreds of ships trapped in the Persian Gulf to exit through the narrow