The Orsat analysis (% mol and water-free basis) of combustion gases is as follows: 0.99 % CO, 1.99 % H2, 6.36% O2 and 81.71% N2. If the partial pressure of water is 76 mmHg and the total pressure of the combustion gases is 760 mmHg: a. What is the mass fraction of all the components in a water-free basis? b. What is the mole fraction of all the components including water? c. What is the average molecular weight of the gases?