ELMAU, Germany (AP) — Leaders of the world’s wealthiest democracies have struck a united stance to support Ukraine for “as long as it takes” as Russia’s invasion grinds on. They vowed to hit Russia with immediate and severe economic pain for its invasion. Part of that could be steps to cap Russia’s income from oil sales that are financing the war. The final statement from the Group of Seven sets up more discussion in the weeks ahead to explore measures to bar import of Russian oil above a certain level. Leaders also agreed on a ban on imports of Russian gold and to step up aid to countries hit with food shortages by the blockade on Ukraine grain shipments through the Black Sea.