A compound with a molecular formula c8H10 produces an It spectrum with many signals including 3108,3066, 3050, 3018, and 1608 cm-1. The NMR spectrum of this compound exhibits a singlet at 2.2 ppm(I=6H) and a multiplet at 7.1 ppm (I=4H). The 14c r spectrum of this compound exhibits signals at 19.7, 125.9, 129.6, and 136.4 ppm. Draw the structure of this compound