For which film did Allison Janney win the Oscar for Best Supporting Actress?

For which film did Alicia Vikander win the Oscar for Best Supporting Actress? Who won the Oscar for Best Supporting Actress for 'Fences'? For which film did Viola Davis win the Oscar for Best Supporting Actress? Who won the Oscar for Best Supporting Actress for 'I, Tonya'? Who won the Oscar for Best Supporting Actress for 'If Beale Street Could Talk'? For which film did Regina King win the Oscar for Best Supporting Actress? Who won the Oscar for Best Supporting Actress for 'Marriage Story'? For which film did Laura Dern win the Oscar for Best Supporting Actress?