Which one of the following free-body diagrams best represents the free-body diagram, with correct relative force magnitudes, of a person in an elevator that is traveling upward but is gradually slowing down at a rate of 9 m/s2? 
f is the force of the floor on the person and 
g is the force of gravity on the person.
Definitions:
Public Choice Theory
A framework that analyzes how public decisions are made, focusing on the behavior and interests of voters, politicians, and bureaucrats.
Excess Burden
The cost to society created by market inefficiency, which occurs when supply and demand are out of equilibrium, often due to taxes or monopolies.
Social Cost
The total cost to society as a result of an action or activity, including both private costs incurred by individuals and external costs affecting others.
Monopoly Profit-maximizing
The process by which a monopoly sets its output and price levels to achieve the highest possible profit, given its unique position as the sole seller of a product or service.
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