
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
Given a comprehensive high school with 3500 high school students and 1500 junior high school students, and knowing that 70 high school students are drawn, calculate the sample size of this stratified sampling plan.

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