
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 $w < 0$ and $|w| < 1$, the function is $f(x)=\sin (wx+ \frac {π}{4})$.
(1) If $w=- \frac {1}{2}$, find the minimum positive period, symmetry center, and symmetry axis of the function $f(x)$.
(2) If $f(x)$ is monotonically decreasing on $(\frac {π}{2},π)$, find the range of $w$.

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