C 63 15% H 5 30% O 31 55% N 0% X 0%1 identify functional group and label all peaks (stretch or bend)

Question

C: 63.15%, H:5.30%, O:31.55%, N:0%. X:0%

1.identify functional group and label all peaks (stretch or bend)

2.find fragment ion from mass spectrum.(base peak and molecular ion peak) find structure using both?

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