please label all relevant peaks and indicate whether each vibrational mode corresponds to a stretch or an out of plane bend.

how do i identify the functional groups?

SMIULILL 1 85 mm 80 75 70 65 60 55 50 45 40 35 30 25 1000 1500 20 2500 2000 Wavenumbers (cm-1) 15 3000 3500 4000