Do synthesized 4-methylcyclohexane in an experiment. Get a good IR, very alike to the "real" one. Require interpreting the presence and absence of peaks. There is a small peak at 1350cm-1, larger peak at 1450cm-1, and small peak at 1650 cm-1, broad peak at 2800-2900cm-1 and smaller peak at 3100cm-1. Explain what do these mean in terms of functional groups?