can u answer this?

70-75. (3 PTS) What makes a good fuel? Give the characteristics of a good fuel. 76-78. (3 PTS) Give the advantages and disadvantages of using Biodiesel as an alternative source of fuel nowadays. 79-82 (4 PTS.) A coal has the following composition by weight C = 75%, O = 23%, S = 1%, N = 1% and ash = 5%. Net calorific value of the fuel was found to be 9600.3 kcal/kg. Calculate the %H and GCV. 83-86 (4 PTS.) A gaseous fuel has the following composition of volume: Hy = 24%, CH4 = 30%; C2H4 = 11%, CH4 = 4,5%, CH = 2.5%, C = 6%; C = 8%, O = 2% and Na 12% Calculate the (1) air to fuel ratio and (2) volume of dry products of combustion using 40% excess air. 86-90 (4 PTS.) A sample of lignite was found to contain 34.55% moisture, 22.91% FC, 7.2% ash, 1.1% S and 0.57% N with calorific value of 16.45 kJ/kg. Calculate the proximate and ultimate analysis of the sample