Outline reasonable mechanisms for each of the following reactions.

Write stereochemical formula for the compounds A to G

(a) $\mathrm{cis}-3-\mathrm{Methylcyclopentanol} +{\mathrm{C}}_6{\mathrm{H}}_5\mathrm{COCl}\stackrel{}{\to }\left[\mathrm{A}\right]\underset{\mathrm{reflux}}{\overset{{\mathrm{OH}}^{-}}{\to }}\left[\mathrm{B}\right]$.

(b) $\mathrm{cis}-3-\mathrm{Methylcyclopentanol} + {\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{SO}}_2\mathrm{Cl}\stackrel{}{\to }\left[\mathrm{C}\right]\underset{\mathrm{DMSO}}{\overset{{\mathrm{OH}}^{-}}{\to }}\left[\mathrm{D}\right]$

(c) $\left(\mathrm{R}\right)-2-\mathrm{Bromoheptane} + {\mathrm{OH}}^{-}\stackrel{\mathrm{acetone}}{\to }\left[\mathrm{E}\right]$

(d)   $\left(\mathrm{R}\right)-2-\mathrm{Bromoheptane}+{\mathrm{CH}}_3\mathrm{COONa}\stackrel{}{\to }\left[\mathrm{F}\right]\underset{\mathrm{reflux}}{\overset{{\mathrm{OH}}^{-},{\mathrm{H}}_2\mathrm{O}}{\to }}\left[\mathrm{G}\right]$

Identify the products $\mathrm{X}, \mathrm{Y} \mathrm{and} \mathrm{Z}$ in the given reactions:

.

Aspartame, an artificial sweetening agent, has the following structure

On hydrolysis with dilute $\mathrm{HCl}$, it will give

X and Y are: