The figure below shows the nodes (A-I) and capacities (labelled on arcs in packages/day) of a shipping network. The firm would like to know how many packages per day can flow from node A to node I. 
What is the capacity of the connection between nodes B and E?
Definitions:
Underground Economy
Unreported or illegal production of goods and services that is not counted in GDP.
GDP
GDP, or Gross Domestic Product, represents the entire value of goods and services produced within a nation's boundaries during a certain time frame.
Net Exports
The value of a country's total exports minus its total imports; a positive number indicates a trade surplus, and a negative number indicates a trade deficit.
Consumption
The use of goods and services by households.
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