$K$$8$ is the constraint $-2$X$1+$ X$2<=2$; $K$$9$ is the constraint $-1$X$1+$ X$2<=3$; $K$$10$ is the constraint X$1<=$

$3$ If the right hand side $($RHS$)$ for constraint $3$ is increased by $1,$ the optimal solution value decreases by $3\mathrm{.}5.$

The RHS for constraint $2$ can be increased by $25$ without changing the optimal corner point.

If the right hand side $($RHS$)$ for constraint $3$ is increased by $2,$ the optimal solution value decreases by $6.$

The RHS for constraint $2$ can be reduced by $25$ without changing the optimal corner point.