a) Describe the four major processes in an ideal Carnot cycle, and state the assumptions for each process in the ideal case? [10 marks] b) What is the major advantage of a simple Rankine Cycle compared to the ideal Carnot cycle? [5marks) c) What is the first enhancement that can be made to a simple Rankine cycle, how does it affect the temperature-entropy diagram, what improvements does it lead to and what is the major limiting factor on implementing this enhancement? [5 marks) d) How can this limiting factor on the Rankine cycle enhancement be mitigated by a further modification to the cycle, and what are the advantages and drawbacks of this additional modification? [5marks)