
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
(1) Given that the complex number $z$ corresponds to a point in the fourth quadrant of the complex plane, $|z|=1$, and $z+ \overline {z}=1$, find $z$;
(2) Given that the complex number $z= \dfrac {5m^{2}}{1-2i}-(1+5i)m-3(2+i)$ is a purely imaginary number, find the value of the real number $m$.

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