Facts: - residence: london - education: university of the witwatersrand queens ' college , cambridge - birth date: c. 1949 - name: ken costa - birth place: south africa - occupation: banker , philanthropist Based on these bullet points, write a short biography describing the life of ken costa .
The answer to this question is:
ken costa -lrb- born c. 1949 -rrb- is a london-based south african banker and christian philanthropist .he served as the chairman of lazard from 2007 to 2011 .