vous pouvez m'aidez svp faut transfomer c phrase en voix passive enfin je croix merci

Transform the sentences in the passive voice:

1/ A policeman arrested Rosa Parks in1955=>
2/A white man assassinated Martin Luther King in 1968=>
3/The american people elected Barak Obama president in 2009=>
4/Students organized sit-ins against segregation in the1950s=>
5/M.L.King pronounced a speech in1963=>