In Fig. 18-36, a gas sample expands from V0 to 4.0V0 while its pressure decreases from p0 to p0/4.0.

If V0 = 1.0 m3 and p0
= 40 Pa, how much work is done by the gas if its pressure changes with volume via (a) path A, (b) path B, and (c) path C?