One mole of air, initially at 150(C and 8 bar, undergoes the following mechanically reversible changes. It expands isothermally to a pressure such that when it is cooled at constant volume to 50(C its final pressure is 3 bar. Assuming air is an ideal gas for which CP = (7/2) R and CV = (5/2) R, calculate W, Q, (U, and (H.