Please be very explicit in your development. Thank you!

2.28A gas in a piston-cylinder assembly undergoes a compression process for which the relation between pressure and volume is given by pVn= constant. The initial volume is 0.1m3, the final volume is 0.04m3, 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