What is Rating, when Air Date is "July 24, 2008*", and when Weekly Winner is "Sales Rep. Oscar Ledezma"?
CREATE TABLE "ratings_and_results" (
  "air_date" text,
  "rating" text,
  "18_49" text,
  "viewers" text,
  "weekly_winner" text
);
SELECT "rating" FROM "ratings_and_results" WHERE "air_date"='july 24, 2008*' AND "weekly_winner"='sales rep. oscar ledezma';