
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
The three grades of a high school have a total of 2000 students with the ratio of the number of students in first, second, and third grades being 5:3:2. To draw a sample of 20 students from all high school students, the method of \_\_\_\_\_\_ should be used to select the sample, and the number of students drawn from the second grade in this sample should be \_\_\_\_\_\_.

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