Use the following figure to answer the question : Figure 9-3 : shows the marginal cost curve,average total cost curve,average variable cost curve,and marginal revenue curve for a firm for different levels of output. 
-Refer to Figure 9-3.At the output level OC,average fixed cost is equal to _____.
Definitions:
Menopause
A natural biological process in women that marks the end of their reproductive years, characterized by the cessation of menstruation.
Late Adulthood
A life stage characterized by the aging process, typically considered to start around the age of 65 years and onwards.
Evolutionary Perspective
A theoretical approach that explains useful mental and psychological traits—such as memory, perception, or language—as adaptations, i.e., as the functional products of natural selection.
Psychosocial
Pertaining to the interrelation of social factors and individual thought and behavior.
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