Consider the following linear programming problem:

Max,$Z=80x_1+90x_2$

Subject to: $3x_1+5x_{2}32$

$($constraint $1)$

$8x_1+12x_{2}60$

$2x_1+4x_{2}3$

$4x_1+6x_{2}20$

$x_1,x_{2}0$

$($constraint $2)$

$($constraint $3)$

$($constraint $4)$

$($non$-$negativity constraints$)$

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

$8$

$10$

$12$

$16$

None of the above