Infrared Spectroscopy

Below are spectra for simple organic compounds. Using each spectra, determine:

1. the type(s) of bond(s) that each labeled signal is responsible for;
2. the functional group(s) present in the molecule; and
3. a proposed structure of the molecule.

You may ignore any signals in the finger print region of the spectra.

please answer asap!

9. \begin{tabular}{|c|c|} \hline Peak & Wavenumber (cm1) \\ \hline A & 2961 \\ \hline B & 1738 \\ \hline C & 1468 \\ \hline D & 1187 \\ \hline \end{tabular}