The proton NMR spectrum of ethanol contains a triplet peak with relative intensities 1:2:1 for the CH3 protons, a quartet with relative intensities 1:3:3:1 for the CH2 protons, and a singlet peak for the OH proton. These peaks have total relative intensity ratios of 3:2:1. For each of the following molecules give a similar description of the proton NMR spectrum:
a. CH3CH2C1O2H;
b. CH3CH2OCH2CH3;
c. Benzene;
d. 1, 4-dichlorobenzene;
e. 1, 3-dichlorobenzene.