Question

Can u help me analyze and how to prove that 1-Bromobutane is what this IR Spectra shows pls, im confused. thanks.

Spectrum Version 10 54 Tuesday, November 07,2017 4:18 PM Administrator Tuesday, November 07, 2017 4:18 PM Date 101 100 96- 94 92 195.6 6 51cm-1, 96.30% 138092 rm-1 . 9 1ST 867.02cm-1.94b1%T 2873. 1, 89.07%T 1462.05cm-1, 87.5 740 51cm-1, 86 1 1%T 2934 45cm-1, 84.63%T 1216 11 m-1, 82.89%T 296125 1,78.17%T 126 1.70cm-1.78 9396T 1500 78 2500 2000 1000 650 3500 3000 cm-1