Maximize $,Z=140x_1+205x_2+190x_3$

Subject to

$10x_1+15x_2+8x_{3}610$

$\frac{x_1}{x_2}3$

$\frac{x_1}{(x_1+x_2+x_3+3)}0\mathrm{.}4$

$x_2{x}_3$

$x_1,x_2,x_{3}0$

What is the upper limit of the third coefficient of the objective function?

$190$

$140$

$263$

It is "infinity", so there is no upper limit$.$

None of the above