
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
For a certain type of car, the purchase cost is $10$ ten thousand yuan, and the annual expenses for insurance, road maintenance, and car fees are about $0.9$ ten thousand yuan. The maintenance fee for the first year is $0.2$ ten thousand yuan, and it increases by $0.2$ ten thousand yuan each subsequent year. How many years of use would minimize the average cost of this car?

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