Can anyone solve these please!!

a) Saturated steam ( 100% vapor) at 70 bar is cooled, first under constant volume until pressure is 38 bar, then by constant pressure until saturated liquid. Determine the amount of heat for each leg -of the process. b) A vapor/liquid mixture of steam at 70 bar with quality 80% is first cooled under constant volume to 38 bar, then heated or cooled, as needed, under constant pressure until it becomes saturated vapor. Determine the amount of work for the complete process. Report in kJ/kg with the appropriate sign. c) Superheated steam at 70 bar, 400C, is first heated under constant pressure to 550C, then cooled under constant volume to 400C. Determine the total amount of heat