identify the structure with molecular formula C10H12O2 that is consistent with the following stereoscopic data

IR: 1680 cm^-1, 2750 cm^-1, 2850 cm^-1

1h NMR: 1.1 ppm (triplet, I = 3h), 3.5 ppm (quartet, I = 2H). 7.3 ppm, (doublet, I = 2H), 9.9 Ppm, (singlet, I = 1h)

Identify the structure with molecular formula C10H12O2 that is consistent with the following spectroscopic data. IR: 1680cm1,2750cm1,2850cm1 1HNMR:1.1ppm (triplet, I=3H ), 3.5ppm (quartet, I=2H ), 4.5ppm (singlet, I=2H ), 7.3ppm (doublet, I=2H ), 7.7ppm (doublet, I=2H ), 9.9 ppm (singlet, I=1H ) 1 II III IV II III IV II III IV