The molecular formulas, IR and 1H NMR spectra of different organic compounds are shown below. The 1H NMR spectra were all run at 300MHz in CDCl3. Identify the compounds by interpreting both spectra. All peaks must be assigned for the appropriate functional groups (IR) and protons (NMR) to earn full credit. ( 24 pts) 4. C4H8O2 (4pts)