
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 pedestrians set out to meet each other from two points that are 28 km apart. If the first pedestrian had not delayed for 1 hour at a distance of 9 km from his starting point, the meeting would have occurred halfway. After the delay, the first pedestrian increased his speed by 1 km/h and they met at a point 4 km from where he had stopped. Find the speeds of the pedestrians.

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