In this assignment, you will model the behavior of the control system that lowers and raises the gate wnere a road crusses a

Figure $2.$ The control system of a railway gate.

There are two sensors$,$ e$.$g$.$ Sensor One $($left$)$ and Sensor Two $($right$)$ respectively, telling the gate that a train is passed. This is a classical example of a real$-$time system, which we will only model very coarsely here, assuming that there is only a single track with only one train at a time and one gate in this assignment. However, a train could go in either direction. There are some specifications of the scenario following.

$-$When a sensordetects that a train passes, it will emit the signal "Train Passed" to the gatecontroller system, in order to make the gate start moving to the oppositedirection to the previous one, e$.$g$.$ from state up to state down

Weassume that the gate needs between $20$ and $30$ seconds to be lowered $($to go fromthe state up to the state down$)$ or be raised $($to go from the state down to thestate up$)$ or to come down

The gate cannot bemoved when the train is passing. Otherwise, it will lead to tragedy

Your task is to:

Develop a classmodel of the system using the correct UML notation.

Develop a state modelof the system using correct UML notation.

Point out weaknesses of the system, and describe how the system could be improved to be more safe.

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