How do I choose source and sink, or can any node become source and sink?

If I set A as source, F as sink, and cut this way, is the cut equal to 4+2+1+4?

Thanks!

1. Consider this flow network with capacities as shown. 10 2 4 2 Choose a possible combination of source, sink, and the mincut capacity between this source and sink. a) S-E, T F, and mincut 13 b) S-A, T-F, and mincut 4 c) S-C, T-B, and mincut 7 d) S-E, T-F, and mincut 11 4 1 0 7 2