Identify a range of values of 
that produces one copy of the graph. 
Definitions:
SSRIs
Selective Serotonin Reuptake Inhibitors, a class of drugs typically used as antidepressants in the treatment of depression, anxiety disorders, and some other conditions.
Norepinephrine
A neurotransmitter and hormone involved in the body’s fight or flight response; it plays a role in mood regulation.
Serotonin
A neurotransmitter that plays a significant role in mood regulation, digestion, and sleep.
Reward Sensitivity
The degree to which an individual is motivated by the prospect of receiving rewards, thought to be influenced by the neurotransmitter dopamine.
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