Please interpret the following IR spectrum and NMR spectrum that represents a liquid unknown sample.

Please interpret the following IR spectrum and NMR spectrum that represents a liquid unknown sample.

Base on the IR and NMR, please determine the functional groups of the unknown sample and identify the unknown. Base on the classification test I perform, I find that it should be carboxylic acid. But please help me confirm and support my answer using IR. Also, I don’t have the melting point of the derivative yet. But for now please help me identify which compound could be possible. So please use NMR to identify this unknown, state which compounds could be the unknown.

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