
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
From the railway station to the beach is 4.5 km. A boy and a scheduled bus simultaneously set off from the station to the beach. After 15 minutes, the boy met the bus returning from the beach. He managed to walk another $9 / 28$ km from the first meeting point with the bus before being caught by the same bus, which had returned to the station and set off for the beach again. Find the speeds of the boy and the bus, assuming they are constant and that neither the boy nor the bus stopped en route, but the bus made stops of 4 minutes each at the beach and the station.

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