Mao Zedong was the leader of the people's republic of China.
Hitler forced Jews to wear bright yellow stars on their clothes.
At 180 degrees longitude, the "International Date Line" represents the point at which the Eastern and Western Hemispheres experience different days, since this line "zigzags" around the 180 degree mark.
1. right, responsibility
i do not know the answer to any others. sorry
The Organization of Petroleum Exporting Countries unites countries extracting petroleum that are involved in the Middle East, since no western states are members.