a) a) An organic compound was determined to have a molecular formula of C21H22N2O2- Calculate the index of hydrogen deficiency of this compound and state the number of aromatic rings this compound could contain. b) Identify which of the following compound/structure would have the infrared spectrum shown below. Justify your answer. Structure A Structure B H Structure C Structure D MICRONS 1002 TRANSMITTANCE 88888889 1688 cm 00 200 1200 1600 4000 3600 3200 2400 2000 1600 1400 WAVENUMBERS