Direction on how to read Spectrometer Data

[Lan(r)12]

Hey all,

 

I need help in reading this data. I had to identify an unknown in organic lab and I have conclusively shown it to be ethyl p-aminobenzoate, but my professor won't accept my conclusion until I derive a molecular formula from the spectra data. I did everything I could just so I wouldnt have to use the spec data.

 

The pics look large, but theyre kinda hard to read.

 

Any direction or hints as to go about this, well, that would be great.

Thanks!