Compounds Containing Nitrogen

Identify the final product formed when benzenamine reacts with the given reagents in the sequential order as:

i. $\quad\left(\mathrm{CH}_3-\mathrm{CO}\right)_2 \mathrm{O} /$ Pyridine.

ii.      Conc. $\mathrm{HNO}_3+\mathrm{H}_2 \mathrm{SO}_4$ & then reacted with $\mathrm{H}_3 \mathrm{O}^{+}$

iii. $\quad \mathrm{NaNO}_2 \mathrm{HCl}(273 \mathrm{~K})$ & then reacted with $\mathrm{H}_3 \mathrm{PO}_2(\mathrm{aq})$.