Q$3(25\%).$ Isothermal $($integral molar$)$ free energy curves for the binary A$-$B system are shown in

the attached figure; pure $A$ is on the left, pure $B$ on the right.

A and $B$ can form solid or liquid solutions

In solid solution A and $B$ can form an $A-$rich $-$phase or $B-$rich $-$phase

In the figures, green is $-$phase $($I$),$ blue is $-$beta$-$phase $($II$)$ and red is liquid solution $($III$)$

Pure A melts at $T_{m,A}$ and pure $B$ at $T_{m,B}$ and $T_{m,A}>T_{m,B}$

$T_1$ is midway between the melting points of pure A and pure $B$

$T_2$ is below both melting points and $T_2>T_E$

$T_E$ is temperature line for eutectic point

Based on this information: Identify in each figure the phase or phases present at equilibrium and

the composition range for each phase or phases.