Consider the following Linear Program $($LP$)$:

MAXZ $=8$x$1+9$x$2$ subject to:

$7$x$1+3$x$2<=56($Constraint$-$ A$)$

$-2$x$1+4$x$2$ x$1+5$x$24$x$1+4$x$2$

$<=48>=50<=72$

$($Constraint$-$ B$)($Constraint$-$ C$)($Constraint$-$ D$)$

x$1>=0,$ x$2>=0$