The following information is for a public good.Pa and Pb are the prices that individuals A and B are willing to pay for the last unit of a public good,rather than do without it.These people are the only two members of society.Suppose the government has already produced 4 units of this public good.The amount individual B is willing to voluntarily pay for the 4th unit is: 
Definitions:
Canadian Health Care
A publicly funded health care system known as Medicare, which provides universal coverage to all Canadian citizens and residents, with most services provided by private entities under strict government regulation.
Uninsured Americans
Individuals in the United States who do not have health insurance coverage, affecting their access to healthcare services.
Drug Prices
The cost of pharmaceutical products, influenced by factors such as research and development expenses, manufacturing costs, and market demand.
Health Care Reforms
Changes and improvements made to a country's healthcare system with the aim of increasing access to care, improving quality, and managing healthcare costs.
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