Answer
4 moles of $CO$ can be obtained.
12 moles of $H_2$ can be obtained.
Work Step by Step
The diagrams shows the following reaction.
$2CH_4+2H_2O\rightarrow 2CO+6H_2$
The ratio of $CH_4$ input to $CO$ output is $2:2$, so the mole ratio is $4:4$. Four moles of $CO$ can be obtained.
The ratio of $CH_4$ input to $H_2$ output is $2:6$, so the mole ration is $4:12$. Twelve moles of $H_2$ can be obtained.
