1. The problem statement, all variables and given/known data hello, I have this graph and i have to figure out these so to speak characteristics. 1) find incidence matrix 2) arrange peak according to rank and layers 3)draw new arranged graph 4) find new connection matricies of peaks and arcs 2. Relevant equations 3. The attempt at a solution I managed to find the incidence matrix which was pretty much easy but I cant manage to understand what is rank of peaks and what is layers in this context ,there are a lot of different notations out there in various sources. please help?