Answer:
408 J/kg
662696.7 J/kg
Explanation:
Workdone by compression process in a pump can be isothermally expressed as :

For water at inlet pressure 1. 0 bar;
the specific values for :
saturated vapor 
saturated liquid 
∴ we have
= 1.0 bar = 1. 0 × 10⁵ N/m²
= 50 bar = 50 × 10⁵ N/m²
For saturated water output from condenser work; we have
W = 
W = 
W = 408 J/kg
For saturated vapor output from condenser
Work required :

W = 
W = 662696.7 J/kg
Thrust I think lol faxgurscg