Answer
The functional group is $NH_2$; Primary amine.
Work Step by Step
There are two peaks between the $3200-3400 cm^-1$ region, which indicates that there are two H's, so it's $NH_2$; A primary amine.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.