pls help me to solve these two questions

A rigid tank contains 1kg of R134a at 100C,800kPa. A valve on the cylinder is opened, and R-134a flows out until the final pressure is 400kPa. Heat is transferred so that the final temperature of the R-134a is 10C. Determine: a) The amount of mass that left the cylinder. b) The work done on the R-134a. c) The amount and direction of heat transferred. - Example 4-5 Two kilograms of saturated vapor water is contained 1/q cylinder device at 200kPa. Heat is added to the watc. temperature reaches 300C. a) Show the process on a PV and TV diagrams. b) How much work does the water do on the piston? c) Find the required heat transfer for the water