Steam at 8.8 bar and 0.9 dry is supplied to an engine which expands it adiabatically to the release pressure of

Question

Steam at 8.8 bar and 0.9 dry is supplied to an engine which expands it adiabatically to the release pressure of

1.2 bar when the pressure falls at constant volume to the exhaust pressure of 0.2 bar. Calculate 

a) steam consumption in kg/kWh

b) mean effective pressure

c) Heat to be removed by the condenser per kg of exhaust steam