20. A Rankine cycle (which will be explained in detail towards the end of the semester) is presented in the figure below. The system is shown on the left. The representation of the cycle is on the right.The fluid running inside the system is water. Disregard how the system works for now (the professor is going to explain it briefly in the third class). The coordinates of the plot are the specific entropy (s) and temperature (T). From analyzing the plot, Which process is isothermal? Which processes are isentropic?

Fig: 1

Fig: 2

Fig: 3

Fig: 4

Fig: 5