
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
Three participants start the 2289th practice again. They need to cover an 84-kilometer distance using two bicycles. On foot, they travel at 5 kilometers per hour, and on a bicycle, they travel at 20 kilometers per hour. They still cannot ride together on one bicycle, but now one cyclist can tow an empty bicycle while maintaining a speed of 20 kilometers per hour.

How long will it take for all three participants to reach the destination?

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