What is WSU Year(s), when Pro Year(s) is 1974-77?
CREATE TABLE "players_in_the_nba" (
  "name" text,
  "wsu_year_s" text,
  "position" text,
  "team" text,
  "pro_year_s" text
);
SELECT "wsu_year_s" FROM "players_in_the_nba" WHERE "pro_year_s"='1974-77';