In a modified Rankine cycle power plant, saturated steam at 40 bar expands in the high-pressure turbine to 3.5 bar. The steam then enters a steam separator where the liquid is separated and pumped to the boiler while the dry saturated steam is sent to the low-pressure turbine in which expands to the condenser pressure of 0.05 bar. The condensate in the form of saturated liquid is pumped to the boiler. The processes in the two turbines and the two feed pumps are isentropic. 

Calculate 

(i) the work output of the turbine, 

(ii) the work input to the pumps

(iii) the thermal efficiency of the plant. Draw the T-S diagram for the cycle.