Consider the following linear programming problem:

Max Z $=80$ x $1+90$ x $2$

Subject to: $3$ x $1+5$ x $2<=32($ constraint $1)$

$8$ x $1+12$ x $2<=60($ constraint $2)$

$2$ x $1+4$ x $2>=3($ constraint $3)$

$4$ x $1+6$ x $2>=20($ constraint $4)$

x $1,$ ?x $2>=0($ non $-$ negativity constraints $)$

What is the slack or surplus associated with the second constraint in the coordinate $(2,3)?$