Below is the 13C-NMR spectrum for a compound with a molecular formula of C.H10 Br2. The IR spectrum of this compound shows one band of significance: a medium band at 1660 cm 1. The DEPT-90 spectrum shows two peaks at 34.5 and 123.0 ppm. The DEPT-135 spectrum shows positive signals at 11.4, 26.2, 34.5 and 123.0 ppm; and negative signal at 52.5 ppm. What is the structure of this compound? 120 100 80 60 40 20 PPM PPM . CHH - CH Br Br Br HC 2 HC-ce BY o B Br . HO . Bi . Br