A gas in a piston cylinder assembly undergoes a compression process for which the relation between pressure and volume is given by PV^n = constant. The initial volume is 0.1 m^3, the final volume is 0.04 m^3, and the final pressure is 2 bar. Determine the initial pressure, in bar, and the work for the process, in kJ, if a) n=0, b) n=1, c) n=1.3.