**The capacity from tank 4 to tank 5 is 10.**

Willy Wonka has a chocolate pipeline distribution network as shown below. Each node corresponds to a single storage tank, and the numbers on the edges represent flow capacities per hour) of some unit of fluid chocolate. Note that flows are allowed in both directions between some, but not all, of the tanks. Willy would like to determine the maximum flow that can be sent from tank 1 to tank 8 per hour. 2 15 5 10 20 1 4. 8 15 13 6 3 15 12 10 10 Willy Wonka has a chocolate pipeline distribution network as shown below. Each node corresponds to a single storage tank, and the numbers on the edges represent flow capacities per hour) of some unit of fluid chocolate. Note that flows are allowed in both directions between some, but not all, of the tanks. Willy would like to determine the maximum flow that can be sent from tank 1 to tank 8 per hour. 2 15 5 10 20 1 4. 8 15 13 6 3 15 12 10 10