How to calculate the stcoichiometric air-fuel ratio in Q4 using the data from table 'Q1'?

Overview Build an Excel model of biomass combustion and gasification systems. Combustion (1.0) will be modelled using the complete combustion assumption. Gasification (>1.0) will be modelled using a simplified version of the chemical equilibrium assumption. Prepare and submit a report based on the template given to you. Residues collected after the harvesting of a Douglas fir plantation have the proximate (Dry) and ultimate (DAF) compositions given below and are to be used in a renewable district heating system. When the residues are collected, the moisture content is 52%. The residues are left to dry naturally by the roadside until the moisture content reduces to 25%. They are collected and delivered by truck to the district heat production site. At the site, they are dried in a dryer until the moisture content reaches 12%, and then introduced to an adiabatic fixed bed combustion system. In the fixed bed, the residues are burned in air and the hot product gas is used to generate steam and hot water for local heat users. Table Q1: (a) Proximate and (b) Ultimate analyses for Douglas fir (a) Proximate analvsis (b) Ultimate analvsis Combustion questions (all have equal weighting) 1. If 500 tonnes of Douglas fir residues (moisture content 52% ) are collected and left for drying at the roadside, what is the mass of residues (moisture content now 25% ) that will be delivered by truck to the dryer? 2. Calculate the minimum amount of thermal energy needed to reduce the moisture content of the residues delivered to the dryer from 25% to 12% ? Recall that the latent heat of vaporisation of H2O is 2.443MJ/kg. 3. What is the mass of residues (moisture content now 12% ) introduced to the combustion system? 4. Calculate the stoichiometric air-fuel ratio (AFst) for the residues introduced to the combustion system. 5. For equivalence ratio in the range 0.4-1.0, calculate and plot product mole fractions of CO2,H2OandO2. 6. For equivalence ratio in the same range as above and the assumption of an adiabatic combustor, calculate and