Table: dragons_den_episodes_2
Columns: episode
first_aired
entrepreneur_s
company_or_product_name
money_requested
investing_dragon_s

Question: Who were the Investing Dragons in the episode that first aired on 18 January 2005 with the entrepreneur Tracey Herrtage?
SQL: SELECT "investing_dragon_s" FROM dragons_den_episodes_2 WHERE "first_aired" = '18 january 2005' AND "entrepreneur_s" = 'tracey herrtage'

Question: What is the average money requested in the episode first aired on 18 January 2005 by the company/product name IV Cam
SQL: SELECT AVG("money_requested") FROM dragons_den_episodes_2 WHERE "first_aired" = '18 january 2005' AND "company_or_product_name" = 'iv cam'