A polytropic process is one in which the pressure, p, and volume, V, are related by the formula npVc=where c is a constant. If the pressure and volume in the first state are p1 = 10 psia and V1 = 5 ft3 and the pressure and volume in the second state are p2 = 100 psia and V2 = 1 ft3, what is the value of n?