A network of railway lines connects the main lines entering and leaving a city. Speed limits, track reconstruction, and train length restrictions lead to the flow diagram below, where the numbers represent how many cars can pass per hour. Formulate an LP to find the maximal flow in cars per hour from Node 1 to Node F. 
Definitions:
Pragmatics
A subfield of linguistics dedicated to studying how language operates in social environments and how people convey and interpret meanings using language.
Mapping
The process of creating a visual representation of a particular area or concept.
Comprehension
The ability to understand and make sense of text, speech, or any form of communication.
Dynamics
The forces or properties that stimulate growth, development, or change within a system or process.
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