
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 average of Amy's, Ben's, and Chris's ages is 15 years. Five years ago, Chris was the same age as Amy is now. In 4 years, Chris's age will be $\frac{3}{4}$ of Ben's age. How many years old is Chris now?

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