Name the total number of segment c for pressure cookers
CREATE TABLE "season_13_2009" (
  "series_ep" text,
  "episode" real,
  "segment_a" text,
  "segment_b" text,
  "segment_c" text,
  "segment_d" text
);
SELECT COUNT("segment_c") FROM "season_13_2009" WHERE "segment_a"='Pressure Cookers';