Find the second derivative of the function. 
Definitions:
Possible Selves
The aspects of oneself that an individual imagines they could become, might become, or are afraid of becoming in the future.
Possible Self
A component of self-concept that represents an individual's ideas of what they might become, what they would like to become, and what they are afraid of becoming.
Afraid Of Becoming
The fear or anxiety about evolving into someone or something that one does not want to be.
Used To Be
A phrase indicating a past condition, situation, or habit that has changed and no longer exists or occurs.
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