
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
Given that the moving point $P$ satisfies $|\frac{PA}{PO}|=2$ with two fixed points $O(0,0)$ and $A(3,0)$, let the locus of point $P$ be curve $\Gamma$. The equation of $\Gamma$ is ______; the line $l$ passing through $A$ is tangent to $\Gamma$ at points $M$, $B$, $C$ are two points on $\Gamma$ such that $|BC|=2\sqrt{3}$, $N$ is the midpoint of $BC$. The maximum area of triangle $AMN$ is ______.

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