i just need d. thank you

Thirty liters of a monatomic ideal gas are confined in a cylinder with a moveable piston. The gas starts out at a temperature of 37C under a pressure of 1.5atm. We will call this condition of the gas State I. (a) How many moles of gas are present? (b) The gas is heated at constant pressure to twice the initial volume. What is the temperature of the gas at the end of this process? (c) Starting with the gas in State I again, it undergoes an isothermal expansion to 60, what is the new pressure of the gas? (d) Again, the gas starts from State I. This time it undergoes an adiabatic expansion to 60. What are the temperature and pressure of the gas at the end of this process? (e) Finally, starting from State I, the gas undergoes a constant volume process to a pressure of 3atm. What is the final temperature of the gas at the end of this process