Suppose it is estimated that for every $1 spent on fatty fast food that government must increase health expenditure by $0.25 to pay for the medical treatment caused by its consumption through the Medicare System. The Medicare System is funded by Australian taxpayers.

1.If a Pigouvian Tax could be applied to fatty fast food at what rate should it be set? How would this achieve the Socially Efficient outcome?

Could you please help me answer this question?