
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
Two brothers had tickets to a stadium located 20 km from their home. To reach the stadium, they decided to use their bicycle and agreed to start at the same time, one on the bicycle and the other on foot. After traveling a part of the distance, the first brother will leave the bicycle, and the second brother, upon reaching the place where the bicycle is left, will ride it and catch up with the first brother at the entrance to the stadium. Where should the first brother leave the bicycle, and how much time will it take to reach the stadium if each brother walks at a constant speed of 4 km/h and rides 5 times faster?

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