2- Addition of an appropriate catalyst will result in a greater amount of C(g)
3- Lowering the reaction temperature to 100 celsius will result in the formation of a greater amount of C(g)
4- Addition of an inert gas at constant volume wil have little or no effect on equilibrium
This solution is provided in 161 words in an attached .doc file. It describes how volume and pressure are affected in an endothermic reaction. It also discusses Le Chatelier Principle and how enthalpy and equilibrium change with temperature.