Read and model a directed flow network

A directed network is used for a parcel-sorting network. It transfers parcels each hour. Each edge label gives a capacity in parcels/h; flow can follow an edge only in the arrow direction

The edge data are: e1: joins U and F1, capacity 200 parcels/h; e2: joins U and E1, capacity 240 parcels/h; e3: joins U and H1, capacity 440 parcels/h; e4: joins F1 and C1, capacity 420 parcels/h; e5: joins F1 and O, capacity 100 parcels/h; e6: joins E1 and C1, capacity 440 parcels/h; e7: joins E1 and O, capacity 180 parcels/h; e8: joins H1 and C1, capacity 440 parcels/h; e9: joins H1 and O, capacity 280 parcels/h; e10: joins C1 and D, capacity 460 parcels/h; e11: joins C1 and G1, capacity 340 parcels/h; e12: joins O and D, capacity 100 parcels/h; e13: joins O and G1, capacity 240 parcels/h; e14: joins D and T, capacity 240 parcels/h; e15: joins G1 and T, capacity 360 parcels/h

Use the node labels and arrows in the diagram to identify the requested roles and direction