A piston-cylinder assembly contains 1 lb of Refrigerant 134a initially as saturated vapor at 10°F. The refrigerant is compressed adiabatically to a final volume of 0.8 ft3. Determine if it is possible for the pressure of the refrigerant at the final state to be
(a) 60 lbf/in.2
(b) 70 lbf/in.2