For the gas$-$phase reaction

$C{H}_3\frac{C}{O}O{C}_2{H}_5{?}_{\text{e}\text{t}\text{h}\text{y}\text{l}\text{a}\text{c}\text{e}\text{t}\text{a}\text{t}\text{e}\text{w}\text{a}\text{t}\text{e}\text{r}}+H_2{O}_{\text{a}\text{c}\text{e}\text{t}\text{i}\text{c}\text{a}\text{c}\text{i}\text{d}}C{H}_3\frac{C}{O}O{H}_{\text{e}\text{t}\text{h}\text{a}\text{n}\text{o}\text{l}}+{}_{C_2{H}_{5}OH}$

the equilibrium constant is $4\mathrm{.}00$ at $120C.$

a$.$ If you start with $1\mathrm{.}00$ bar of both ethyl acetate and water in a $10\mathrm{.}0-$L container, what is the extent of the reaction at equilibrium?

b$.$ What is ${}_{rxn}G$ at equilibrium? Explain.

c$.$ What is ${}_{rxn}G$ at equilibrium? Explain.