What is the major product ' R ' in the following reaction sequence?

$$\begin{gathered} 2{\mathrm{CH}}_3\mathrm{COOH}\stackrel{{\mathrm{P}}_2{\mathrm{O}}_5/∆}{\to }\underset{\mathrm{M}}{{\mathrm{CH}}_3-\mathrm{CO}-\mathrm{O}-\mathrm{CO}-{\mathrm{CH}}_3} \\ {\mathrm{CH}}_3-\mathrm{CO}-\mathrm{O}-\mathrm{CO}-{\mathrm{CH}}_3\stackrel{{\mathrm{C}}_6{\mathrm{H}}_5-{\mathrm{NH}}_2}{\to }\underset{\mathrm{N}}{{\mathrm{C}}_6{\mathrm{H}}_5-{\mathrm{NHCOCH}}_3} \\ {\mathrm{C}}_6{\mathrm{H}}_5-{\mathrm{NHCOCH}}_3\underset{\left(\mathrm{ii}\right) {\mathrm{H}}^{+}/{\mathrm{H}}_2\mathrm{O}}{\overset{\left(\mathrm{i}\right) {\mathrm{HNO}}_3/{\mathrm{H}}_2{\mathrm{SO}}_4, 288 \mathrm{K}}{\to }}\underset{\mathrm{M} (\mathrm{p}-\mathrm{Nitroaniline})}{{\mathrm{NO}}_2-{\mathrm{C}}_6{\mathrm{H}}_4-{\mathrm{NH}}_2} \end{gathered}$$