The work developed in the turbine per kg steam entering the turbine at state 5 is

Question

The temperature- entropy diagram for a steam turbine power plant, operating on the Rankine cycle with reheat and regenerative feed heating is shown in the given figure. If m denotes the fraction of steam bleed for feed heating, the work developed in the turbine per kg steam entering the turbine at state 5 is 

(a) (h₅- h₄)+ (1-m) (h₃-h₁)

(b) (h₅- h₄)+ (h₃-h₂) + (1-m) (h₁-h₁)

(c)2h₅- h₄+  (1-m) (h₂- h₁)

(d) (h₅ –h₄ ) + (1-m) (h₃- h₂ )