
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
Given that the function \( f(x) \) is a decreasing function on \(\mathbf{R}\) and is also an odd function. If \( m \) and \( n \) satisfy 
\[
\left\{\begin{array}{l}
f(m)+f(n-2) \leqslant 0, \\
f(m-n-1) \leqslant 0,
\end{array}\right.
\]
then the range of values for \( 5m - n \) is what?

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