
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 certain school, the number of students in the first, second, and third year of senior high are 900, 900, and 1200, respectively. The school decides to use stratified sampling to draw a sample of 50 students from the three grades. How many students should be drawn from the third year?

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