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Detailed explanation-1: -Story of the Design The coin and stamp set featured four postage stamps, honoring four African American patriots: Frederick Douglass; Harriet Tubman; Benjamin Banneker; and Salem Poor. The obverse was designed by John Mercanti, who has been at the U.S. Mint since 1974.

Detailed explanation-2: -The correct answer is Martha Washington.

Detailed explanation-3: -Washington Memorial half dollar. The Booker T. Washington Memorial half dollar was designed by Isaac Scott Hathaway and minted in silver between 1946 and 1951.

Detailed explanation-4: -FORT WORTH, Texas (AP)-Treasury Secretary Janet Yellen on Thursday helped mark a milestone in U.S. history when she held up a newly minted $5 bill signed for the first time ever by two women. Yellen’s signature will appear alongside that of U.S. Treasurer Lynn Malerba, the first Native American in that position.