
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
In the Cartesian coordinate system xOy, the parametric equation of line l is $$\begin{cases} \overset{x=1-t}{y=t}\end{cases}$$ (t is the parameter). In the polar coordinate system established with the origin O as the pole and the non-negative semi-axis of the x-axis as the polar axis, the polar equations of curves C1 and C2 are $ρ= \sqrt {3}$cosθ and ρ=3sinθ, respectively.
(I) Find the polar equation of line l;
(II) Suppose one of the intersection points of curve C1 and curve C2 is point A (A is not the pole), and the intersection point of line l and OA is point B. Find the length of segment AB.

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