
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 polar equation of curve C is $\rho=2\cos\theta$, and the parametric equation of line $l$ is $$\begin{cases} x=-1+ \frac { \sqrt {5}}{5}t \\ y= \frac {2 \sqrt {5}}{5}t \end{cases}$$ (where $t$ is the parameter).

(I) Convert the polar equation of curve C into a Cartesian coordinate equation.

(II) Let the intersection of line $l$ and the y-axis be point M, and let N be a moving point on curve C. Find the maximum value of $|MN|$.

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