3) A closed system consisting of 4 lb of a gas undergoes a process during which the relation between pressure and volume is pV = constant. The process begins with pi = 15 lbf/in, v = 1.25 ft/lb and ends with p2 = 53 lbf/in, v = 0.5 ft/lb. Determine (a) the volume, in ft, occupied by the gas at states 1 and 2 and (b) the value of n. (30 points) State 1 Gas State 2 m=4 lb P = 15 lbf/in. v = 1.25 ft/lb Gas P = 53 lbf/in. v = 0.5 ft/lb