Develop the given isobaric sections in the T$($x$1)$ representation from the following p$($T$)$ projection of a binary system of phase type I.

Does it involve positive or negative azeotropy? Justify your answer.

a$=$azeotropic line

c$=$critical curve CP$1$

CP$=$critical points of the pure substances

$1=$vapor pressure curve of pure component $1$

$2=$vapor pressure curve of pure component $2$