Use the following to answer questions : 
-List all the numbers in the set that are elements of Z.
Definitions:
Strange Situation Paradigm
A research method developed by Mary Ainsworth to assess attachment styles in young children through observations of their behavior under stress.
Unpleasantness
A state or feeling of being displeased or uncomfortable.
Specific Form
A precisely defined or identified structure, type, or variant of something.
Affect
An observable expression of emotion or feelings.
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