The data show representative binodal curves for various polystyrene $($PS$)$ in cyclopentane $($CP$)($narrow fractions covering a molecular weight range from $2\mathrm{.}7*10^6$g$/$mole to $3\mathrm{.}7*10^7$g$/$mole$),$ assuming that PS and CP have similar densities. Nothing is said about the polystyrene tactictiy. Assume for the moment that the lowest molecular weight fraction $(37000$g$/$mole$)$ is isotactic polystyrene.The data show representative binodal curves for various polystyrenes $($PS$)$ in cyclopentane $($CP$)($narrow fractions covering a molecular weight

range from $2\mathrm{.}7{10}^6\frac{g}{?}$ mole to $3\mathrm{.}7{10}^4\frac{g}{m}$ole $),$

assuming that PS and CP have similar densities.

Nothing is said about the polystyrene tacticity.

Assume for the moment that the lowest molecular

weight fraction $(37,000\frac{g}{m}$ole$)$ is isotactic

polystyrene $($iPS$).$

$($a$)$ Considering only the lower temperature

regime of the plot, sketch the expected form of the

phase diagram $(T$ vs $w_2)$ over the entire

composition range $(0$