Consider the following linear programming problem: Min Z $=21$x$1+15$x$2$ Subject to: $4$x$1+3$x$2>2002$x$1+$ x$2>70$ X$1,$ X$2=0$ X$$ constraint $2$ A $706766\mathrm{.}671$ Feasible Area B$(5,60)$ objective function optimal point constraint $13547\mathrm{.}550$ X$1$ What is the lower limit of the right hand side of the first constraint $(91)?$