In the cardiopulmonary bypass procedure shown in Figure $15\mathrm{.}12$:

a$.$ How much $O_2($in $c{m}^3$ at standard temperature and pressure$)$ is returned to the patient if the blood flow rate is $5\frac{L}{m}in?$

b$.$ Assuming that the blood flow rate is $5\frac{L}{m}in,$ what gas flow rate is needed to accomplish the indicated changes in $O_2$ and $C{O}_2$ composition?