Table: tv_episodes_49
Columns: no
col
title
directed_by
written_by
u_s_air_date
production_code
u_s_viewers_million

Question: what is the number of the episode in the season that had 5.60 millions of north american spectors?
SQL: SELECT "no" FROM tv_episodes_49 WHERE "u_s_viewers_million" = '5.60'

Question: who are the writers of the episode whose production code is 176206? 
SQL: SELECT "written_by" FROM tv_episodes_49 WHERE "production_code" = 176206