
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
A fast train is moving at a speed of \(c = 60 \, \frac{\text{km}}{\text{hour}}\) past a person standing by a straight railway track. When the train is stationary, its whistle produces a sound at a frequency of \(N = 2048\) Hz. What frequency does the observer hear as the train approaches and then recedes? The speed of sound in air is \(V = 340 \, \frac{\text{m}}{\text{sec}}\).

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