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:
Environmental Factors
Aspects of the environment that can influence an individual's health, including natural, social, and built environments.
Teaching/Learning
The interactive process between a teacher and learner, aiming at transmitting knowledge, skills, and attitudes.
Learner's Needs
These refer to the educational requirements and personal developments necessary for an individual to achieve learning success and satisfaction.
Interactive Process
A dynamic method involving two or more entities engaging in communication or activities, influencing each other in the process.
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