What is the U.S. Rap chart number of the album west coast bad boyz, vol. 3: poppin' collars?
CREATE TABLE "collaboration_singles" (
  "year" real,
  "u_s_hot_100" text,
  "u_s_r_b" text,
  "u_s_rap" text,
  "album" text
);
SELECT "u_s_rap" FROM "collaboration_singles" WHERE "album"='west coast bad boyz, vol. 3: poppin'' collars';