
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 circle \(x^{2} + y^{2} \leq R^{2}\), the two-dimensional probability density is \(f(x, y) = C\left(R - \sqrt{x^{2} + y^{2}}\right)\); outside the circle \(f(x, y) = 0\). Find: a) the constant \(C\); b) the probability that a random point \((X, Y)\) falls within a circle of radius \(r = 1\) centered at the origin, if \(R = 2\).

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