
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 region, there are a total of 2,004 households, including 1,600 farmer households and 303 worker households. Now, a sample of 40 households needs to be drawn. During the entire sampling process, the following sampling methods can be used:
(Write down all the correct serial numbers you think are applicable)
① Simple random sampling  ② Systematic sampling  ③ Stratified sampling

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