Refer to the information provided in Figure 7.4 below to answer the question(s) that follow. 
Figure 7.4
-Refer to Figure 7.4. Diminishing marginal returns begin when the ________ worker is hired.
Definitions:
Exchange Relationships
Interactions between two or more parties in which goods, services, or ideas are exchanged, usually in a market context.
Marketers
Individuals or companies that promote and sell products or services to consumers.
Consultant
A professional who provides expert advice in a particular area such as business, education, law, or technology.
Cupcake Shop
A specialized retail outlet that focuses on the production and sale of cupcakes, often featuring a wide variety of flavors and designs.
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