
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 certain high school has 3000 students, among which the first grade has 800 students with 500 boys and 300 girls; the second grade has 1000 students with 600 boys and 400 girls; the third grade has 1200 students with 800 boys and 400 girls. Now, using stratified sampling method according to the grade proportions, 150 students are sampled. The number of girls sampled from the third grade is __________.

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