A $100$ kg mixture of $27\mathrm{.}8\%$ acetone A$,72\mathrm{.}2\%$ chloroform B$,$ by weight is to be extracted with

a mixed solvent at $25$C$.$ This mixed solvent of unknown composition is known to contain water

S$1$ and acetic acid S$2.$ The mixture of the original mixture and mixed solvent is shaken well,

allowed to attain equilibrium and separated in to two layers. The composition of two layers is given

below

Layer A B S$1$ S$2$

Upper layer $7\mathrm{.}53\mathrm{.}557\mathrm{.}431\mathrm{.}6$

Lower layer $20\mathrm{.}367\mathrm{.}32\mathrm{.}89\mathrm{.}6$

Find a$.$ the quantity of two layers b$.$ weight ratio of mixed solvent to original mixture c$.$

Composition of mixed solvent