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.The collective willingness of this society to pay for the 2nd unit of this public good is: 
Definitions:
Beck Rights
Rights allowing union members to object to the use of their dues for non-bargaining activities, such as political actions.
Political Lobbying
The act of attempting to influence decisions made by officials in the government, often by organizations or individuals with vested interests.
Job Responsibilities
The specific duties, tasks, and functions that an individual is expected to perform as part of their employment role.
Expansion of Job Duties
The broadening of tasks and responsibilities assigned to a position or employee over time.
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