Assignment on Negative Externalities of Tobacco Consumption

This is an economics research essay and I have attached the instructions. You can use as many references as needed and please do not include any other subject before you let me know first because i have to write about what i have already studied. Thank you.

Hi there, these are the calculations included that you can only use
Price elasticity of demand, income elasticity of demand, cross-elasticity of demand, price elasticity of supply.