Using the PC state daemon, calculate from first principle (a) cp (b) cv of steam at 100

Question:

Using the PC state daemon, calculate from first principle
(a) cp
(b) cv of steam at 100 kPa and 320oC. Use a 1oC difference in setting up the neighboring states.
(c) What is the ratio of (cp - cv)/R for steam at this state?
(d) What-if Scenario: What would be the answer in part (c) if the steam is at 10 MPa, 320oC?