which saturated water table is used?

A two$-$phase, liquid$-$vapor mixture of H$2$O$,$ initially at $x=20\%$ and a pressure of $100$ kPa $,$ is contained in a piston$-$ cylinder assembly, as shown in figure below. The mass of the piston is $10$ kg $,$ and its diameter is $15$ cm $.$ The pressure of the surroundings is $100$ kPa $.$ As the water is heated, the pressure inside the cylinder remains constant until the piston hits the stops. Heat transfer to the water continues at constant volume until the pressure is $150$ kPa $.$ Friction between the piston and the cylinder wall and kinetic and potential energy effects are negligible. For the overall process of the water, determine the work and heat transfer, each in kJ$.$