Give the integration and splitting pattern for the indicated signals in the
1H NMR spectrum.

◦ a = 3H, triplet, d = 1H, singlet
◦ a = 2H, triplet; d = 1H, singlet
◦ a = 3H, triplet; d = 1H, triplet
◦ a = 3H, triplet; d = 1H, singlet
◦ a = 2H, triplet; d = 2H, doublet