
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 company has 3 factories producing the same type of electronic product, with the production ratio of the first, second, and third factories being 1:2:1. Using stratified sampling method (each factory's products as one layer), 100 electronic products are sampled from the 3 factories for a lifespan test. Based on the test results, the average lifespans of the products from the first, second, and third factories are found to be 980 h, 1020 h, and 1032 h, respectively. The average lifespan of the sampled 100 products is \_\_\_\_\_\_\_h.

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