while the popular image of Sun Ra during his career was that of an offbeat,___ character at the ____ of both mainstram and avant-garde jazz,many scholars now see Sun Ra as a central figure in the 1950s' Afirican American embrace of scienxe and technology.Sun Ra's art,in this view,looked to both the past and future to ___ and claim new metaphorical and material spaces for the diaspora. Blank one:cheerful、creative、domineering Blank two:epicenter、margins、pedigree Blank three:re-envision、enclose、narrow