What is the lowest age of an astronaut named Stu Roosa?
CREATE TABLE "apollo_astronauts_who_flew_to_the_moon_w" (
  "name" text,
  "born" text,
  "age_on_mission" real,
  "mission" text,
  "mission_dates" text,
  "service" text
);
SELECT MIN("age_on_mission") FROM "apollo_astronauts_who_flew_to_the_moon_w" WHERE "name"='stu roosa';