Producer gas is fuel gas that is manufactured by blowing a coke or coal with air and steam simultaneously. It mainly consists of carbon monoxide, hydrogen, as well as substantial amounts of nitrogen. The caloric value of the producer gas is low. Such a producer gas contains 28% CO, 3.5% CO2, 0.5% O2 and 68% N2. 100 kg of this gas is burned with 20% excess air. If the combustion is only 90% complete, determine the following: (a) The composition of the flue gas (b) The weight of the gaseous products (c) If the excess air increased to 40%, whether the combustion reaction in completed? Justify your anaswer.