Ethanol $(C_2{H}_{5}OH)$ is fed to a furnace at a rate of $100mo\frac{l}{h}$ and burned with excess air. The product gas is analyzed and the following dry$-$basis $($i$.$e$.,$ excluding water$)$ mole percentages are determined: $C_2{H}_{5}OH=0\mathrm{.}5\%,C{O}_2=10\%,CO=1\mathrm{.}5\%.$

a$.$ Draw and label a flowchart of the process

b$.$ Verify the system has zero degrees$-$of$-$freedom

c$.$ Calculate the fractional conversion of ethanol, the percentage excess air fed, and the moles of water in the exhaust.