Use the following to answer questions: 
-(Table: Tonya's Production Function for Apples) Look at the table Tonya's Production Function for Apples. The marginal product of the fourth worker is _____ apples.
Definitions:
Norms
Shared guidelines or rules within a group that dictate appropriate and expected behavior among members.
Social Agreements
Unwritten and often unspoken rules or understandings that govern the behavior of members within a society or group.
Beliefs
Convictions or acceptances that something exists or is true, especially without proof.
Mere Exposure Effect
A psychological phenomenon whereby individuals develop a preference for things simply because they are familiar with them.
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