Direction: Solve the problems using your own handwriting. Make your solution organized by presenting it according to the order of the required and place your final answers in a box. Submit the scanned document/s in a PDF format together with this questionnaire. 1. Given the Volumetric Analysis of a Natural Gas: CH4 = 80.10% Nitrogen = 7.40% CH = 10.70% CO2 = 1.80% Calculate the following: a) Actual A/F ratio at 20% excess air by mass and by volume b) Volumetric Analysis of Products c) A/F ratio considering an incomplete combustion where CO= 10% CO2 Ash = 5.19% 2. Given the Ultimate analysis of Alabama coal: Sulfur = 1.26% Hydrogen = 5.29% Carbon = 79.71% Nitrogen = 1.42% Oxygen = 7.13% Moisture = 4.80% Calculate the following: a) The ash and moisture free analysis b) Actual A/F ratio at 20% excess air c) Gravimetric Analysis of wet gas d) Volumetric Analysis of dry gas e) LHV of the fuel in kJ/kg