Q$4.$ Consider the following linear Programming problem:

Min $Z=x_1+6x_2$

Subject $to2x_1+2x_{2}30$

$,x_{1}5$

$,-x_{2}5$

$,x_1,x_{2}0$

For which values of $$ is $(5,10)$ an optimal solution?

a$.06$

b$.6$

c$.03$

d$.3$