
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 the equation of a circle: $x^2+y^2=4$.

(I) Line $L$ passes through point $P(1, 2)$ and intersects circle $C$ at points $A$ and $B$. If $|AB|=2\sqrt{3}$, find the equation of line $L$.

(II) A line $m$ parallel to the X-axis passes through a moving point $M$ on circle $C$. Let the intersection of $m$ and the Y-axis be $N$. If vector $\overrightarrow{OQ} = \overrightarrow{OM} + \overrightarrow{ON}$ (where $O$ is the origin), find the equation of the trajectory of moving point $Q$.

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