For a cycle with all internally reversible processes, what does the area enclosed by the cycle represent on (a) a P-v diagram?(b) a T-s diagram?

a. (a) net heat input, (b) net boundary work
b. (a) net work, (b) net heat input
c. (a) net boundary work, (b) net heat input
d. It represents the net boundary work in both diagrams
e. It represents the net work transfer and net heat transfer on both diagrams.