
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
At a certain crosswalk, the pedestrian signal alternates between red and green lights, with the red light lasting for 40 seconds. If a pedestrian arrives at the crosswalk and encounters a red light, the probability that they need to wait at least 15 seconds for the green light to appear is ______.

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