Question $1$

Consider the following linear programming problem:

MinZ$=,21$x$\_(1)+15$x$\_(2)$

Subject to:

What is the lower limit of the right hand side of the first constraint $($q$\_(1))?$

$47\mathrm{.}5$

$54$

$140$

$57\mathrm{.}5$

None of the above