hi i need help with this topic please

RESEARCH TOPIC:

In many countries, including Australia, obesity is a problem, and some people in the health industry have argued that a tax on sugar-sweetened beverages (SSBs) is required.

Explain, with the use of an appropriate economic model, the type of externality that a tax on sugar-sweetened beverages (SSBs) would aim to address. Using economic terms and analysis, discuss the possible advantages and disadvantages of this type of tax, and whether or not it is likely to be effective at reducing health problems associated with obesity.