Which constitutional amendments extended the right to vote?

Four different constitutional amendments extended voting rights to various groups:

• Fifteenth Amendment: Prohibited discrimination by race (applied primarily to African-American males), ratified in 1870.
• Nineteenth Amendment: Granted women's suffrage (right to vote), ratified in 1920.
• Twenty-third Amendment: Allowed citizens residing in the District of Columbia the right to vote in presidential elections, ratified in 1961.
• Twenty-sixth Amendment: Reduced the minimum voting age from 21 to 18, allowing younger people the right to vote, ratified in 1971.