
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
There are four individuals: Jia, Yi, Bing, and Ding. It is known that the average age of Jia, Yi, and Bing is 1 year more than the average age of all four people. The average age of Jia and Yi is 1 year more than the average age of Jia, Yi, and Bing. Jia is 4 years older than Yi, and Ding is 17 years old. How old is Jia?

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