$2)$ The molecular formulas, IR and $\text{'}$H NMR spectra of different organic compounds are shown below. The $\text{'}$H NMR spectra were all run at $300$MHz in CDC$13.$ 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$)4.$ C$4$H$8$O$2(4$pts$)$ m $200020001501000500$ HVERURBERI $1210820$ PPM$C_4{H}_{9}Cl$