
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
In a lecture hall, there is a row of connected desks, each seating 6 people. Students can only leave the hall from either end of the row. The time at which each student finishes their exam varies. If a student seated inside the row wants to submit their exam first, they need to disturb others. Let the number of students who disturb others when submitting their exams be a random variable $X$. What is the mathematical expectation of $X$?

Present the answer in LaTex format: \boxed{Your answer}
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