What is the sum of the ratings for episodes with live viewers of 2.96?
CREATE TABLE "ratings" (
  "air_date" text,
  "rating" real,
  "share" real,
  "18_49" text,
  "viewers_live_m" real,
  "viewers_dvr_7_m" text
);
SELECT SUM("rating") FROM "ratings" WHERE "viewers_live_m"=2.96;