Air is compressed in an isentropic process from 20C and 100 kPa until the final volume is

Question:

Air is compressed in an isentropic process from 20ºC and 100 kPa until the final volume is
a) Six times the initial volume,
b) Eight times the initial volume,
c) Ten times the initial volume,. Calculate the final pressure and temperature assuming constant specific heats from Table B-2.