Liquid methanol is fed to a space heater at a rate of $23li\frac{t}{h}$ and is burned with excess air. The product gas is analyzed and the dry$-$basis mole percent of methanol, $CO2$ and $CO$ are found to be $1\mathrm{.}12\%,6\mathrm{.}9\%,2\mathrm{.}2\%,$ respectively. Obtain the density of liquid methanol at $25C$ using tables in Appendix B and calculate the following:

a$.$ Fractional conversion of methanol

b$.$ Percentage excess air fed

c$.$ The flow rate of water vapor $(mo\frac{l}{h}r)$ in the product gas.