
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
Fangfang and Yuanyuan, two students, calculated the expression $-4^2÷(-2)^3×(-\frac{1}{8})$ as follows:

| Fangfang | Yuanyuan |
|----------|----------|
| Fangfang: $-4^2÷(-2)^3×(-\frac{1}{8})$<br/>$=-16\div \left(-8\right)\times (-\frac{1}{8})$①<br/>$=-16÷[(-8)×(-\frac{1}{8})]$②<br/>$=-16\div 1$③<br/>$=-16$④ | Yuanyuan: $-4^2÷(-2)^3×(-\frac{1}{8})$<br/>$=\left(-8\right)\div \left(-6\right)\times (-\frac{1}{8})$①<br/>$=-48×(-\frac{1}{8})$②<br/>$=-6$③ |

$(1)$ In the above calculation process, Fangfang made a mistake in step ____ and Yuanyuan made a mistake in step ____ (fill in the numbers);<br/>$(2)$ Write down your calculation process.

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