An ideal monatomic gas initially has a temperature of 311 K and a pressure of 7.57 atm. It is to expand from volume 571 cm3 to volume 1390 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If, instead, the expansion is adiabatic, what are (c) the final pressure (in atm) and (d) the work done by the gas