Q: Who as collaborated musically with both Leo Abrahams and Art Garfunkel?
Leo Abrahams: Leo Matthew Abrahams (born 1977 in Camden, London) is an English musician, composer and producer. Paul Simon:  Simon's musical career has spanned seven decades, with his fame and commercial success beginning as half of the duo Simon & Garfunkel, which was formed in 1964 with Art Garfunkel.
i don't know