CREATE TABLE table_2701851_5 (production_code VARCHAR, written_by VARCHAR)

What is the production code for the episode written by Kat Likkel & Denise Downer?
SELECT production_code FROM table_2701851_5 WHERE written_by = "Kat Likkel & Denise Downer"
SELECT "production_code" FROM "table_2701851_5" WHERE "Kat Likkel & Denise Downer" = "written_by"