Help plz its important history

Along-run equilibrium occurs when long-run aggregate supply and aggregate demand meet. what does having long-run equilibrium indicate about a society? the society’s supply and demand have stagnated. the society is using all of its resources efficiently. the society’s needs are being fully met. the society is not using all of its resources effectively.

Question 1(multiple choice worth 5 points) the yalta conference failed to achieve which outcome? germany would be divided into zones of occupation. stalin would support the effort to create the united nations. stalin would join the war against japan after germany's defeat. german zones of occupation would have free elections.

Which russian tsar transformed thr royal residence in st. petersburg, the hermitage, into a center of culture, painting, and the performing arts