Consider the structure shown below:

Determine the amine classification of each nitrogen atom as either heterocyclic aromatic, primary, secondary, tertiary, or quaternary.

(i) tertiary; (ii) tertiary; (iii) secondary; (iv) primary

(i) heterocyclic aromatic; (ii) quaternary; (iii) secondary; (iv) tertiary

(i) tertiary; (ii) secondary; (iii) secondary; (iv) secondary

(i) heterocyclic aromatic; (ii) tertiary; (iii) secondary; (iv) primary