#### Answer

(1) In the negative energy region, $\Delta H$ as a function of $T$ is a straight line with only a slight slope, either negative or positive.
(2) In the same energy region, $T$$\Delta S$ is a line whose a steep negative slope and intersects the $\Delta H$ line.
(3) $\Delta G$ is represented by the distance between the $T$$\Delta S$ line and $\Delta H$ line:
$\Delta G=0$ at the point of intersection,
$\Delta G<0$ at $T$ below the intersection,
$\Delta G>0$ at $T$ above the intersection.