Asingle-cylinder internal combustion engine begins its expansion stroke (piston to the far left in the diagram below) with a volume of 0.00110 m^3 and a gas pressure of 10,000 kpa (state 1). as it expands the gas does work on the piston in a polytropic process, until it reaches 8 times its original volume. we assume that the gas is air with ideal gas properties, so that r = 0.287 kj/kg-k, and constant specific heats cv = 0.717 kj/kg-k and cp = 1.004 kj/kg-k. the polytropic exponent n = 1.35.what is the pressure p2 at the end of the expansion stroke? how much work is done on the piston by the gas? during the expansion stoke, the crankshaft turns by an angle q of 0.5 revolutions. what is the average torque tave on the crankshaft during the expansion stroke, given that 1w2 = tave ∙q ? what is the force in newtons acting on the piston in state 1 if its diameter is 94 mm?