music: Alternative Music : Who is the ex-lead singer of the Dead Kennedys?

Questions

ray charles plays piano & what other instrument?

ray charles went blind at what age?

What song has been sung by Bob Marley, Rod Stewart and Aretha Franklin?

What was Bob Marley's first single, released by Leslie Kong in 1962?

What was Jimmy Cliff's character's name in the movie, "The Harder They Come"?