ARCS:[
[1 2]
[1 3]
[2 4]
[3 4]
]

NODES:[
1
2
2
3
4
]

SOURCENODES:[
1
]

SEGMENTS: [
1
2
3
]

Demand: [
(2) 5
(3) 4
(4) 7
]

LossRate: [
(1) 0.1
(2) 0.2
(3) 0.6
]

Breakpoints: [
(0) 0
(1) 4
(2) 7
]