B$)$ The average biomass used to represent many yeasts and bacteria has an elemental composition on a $C$ mole basis, is $C{H}_{1\mathrm{.}8}{O}_{0\mathrm{.}5}{N}_{0\mathrm{.}2}.$ Determine its generalised degree of reduction, $$ and estimate its Gibbs energy and heat of combustion using energy regularity principle.

Express $Y_{\frac{Q}{s}}$ in terms degrees of reduction of substrate, nitrogen source, biomass and product.