The United Nations budget for 2012-13 was 5.15 billion USD. In 2013-14 they were looking to raise 1.6 billion dollars to work in conjunction with the WHO (World Health Organisation) to combat communicable diseases around the planet. (The combat of these diseases is considered to be a Global Public Good).

Answer the following questions:

1. What is the minimum benefit that would have to be derived from the project with the WHO to make economic sense? $ billion. Answer in billions of dollars to one decimal place.
2. If the UN considers raising the funds from its top 17 contributing states, with each paying equal amounts, how much would each state pay? $ million. Answer to the nearest whole millions of dollars (using no decimal places).
3. Australia is one of the top 17 contributing states. Since Australia has one of the smallest gross domestic products (national income) on the list, if the funds were raised using a form of taxation, what tax system would result in Australia contributing the least funds? . Type H for Head, P for Proportional or G for Progressive.