I want a clear solution step by step

3. Use the above result to calculate (VCV)T for water at T=300C and P=30bar. 4. Using the steam tables, complete the table below to arrive at an estimate for VCV at 300C and 30bar. How does this experimental value compare to that obtained in problem \#3? 5. Use the pressure-enthalpy diagram for methane to develop a table similar to problem \#4, then estimate for VCV for methane at 300K and 30 bar. Compare this to (VCV)T calculated using your result in problem #2. Can you make a general statement regarding the accuracy of using cubic equations of state to estimate changes in heat capacities