Drafting model answers for economics question banks -- 2

I am building a question bank for economics and need someone qualified (preferably one with a strong economics teaching background) to draft model essay answers for reference purposes. I am an instructor in economics and business studies (A Level, AP, IB) and therefore require writing assistance to build said question bank.

I am looking to pay between $5-$10/ question depending on complexity and work required. Each question would have answer lengths between 100 and 300 words, some including graphs and other simple diagrams.

Attached is a sample question.