
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
Four vehicles start from point $A$ at the same time and arrive at point $B$ consecutively at equal intervals. The speed of the fastest vehicle is $v_{1}$ and the speed of the slowest vehicle is $v_{4}$. What are the speeds of the other two vehicles?

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