A linear programming problem contains a restriction that reads "the quantity of S must be no less than one$-$fourth as large as T and U combined." Formulate this as a linear programming constraint.

S $/($T $+$ U$)>=4$

S $-\mathrm{.}25$T $-\mathrm{.}25$U $>=0$

S $>=4$T $/4$U

S $>=\mathrm{.}25$T $+$ S $>=\mathrm{.}25$U

$4$S $<=$ T $+$ U