$($Elliott and Lira $2$nd Edition problem $14\mathrm{.}15)$

Calculate the LLE in the system $1-$butanol $(1)+$ methanol $(3)$ at $288\mathrm{.}15K,$ using

UNIQUAC with the following parameters: $r=[3\mathrm{.}4543,1\mathrm{.}4311]$;$q=$

$[3\mathrm{.}052,1\mathrm{.}432]$; and the a values $($in K$)$ are $a_{13}=355\mathrm{.}54$;$a_{31}=-164\mathrm{.}09$;