
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
A class has 48 students. Now, using the systematic sampling method, a sample of size 4 is drawn. It is known that students with seat numbers 6, 30, and 42 are in the sample. What should be the seat number of the fourth student in the sample?

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